001📏Tank Size — Minimum 180 Gallons
Arrowana are tankbusters. An adult needs at least 180 gallons (680L) and 6 ft of length. For Silver and Asian arowana, 300+ gallons (8 ft) is recommended long-term.
Expert tips
- ✓Minimum 180 gal (680L) for any arowana species
- ✓Length matters more than depth — arowana are surface swimmers
- ✓6 ft × 2 ft × 2 ft = absolute minimum; 8 ft × 3 ft × 2.5 ft preferred
- ✓Never keep an arowana in a tank shorter than 1.5× its body length
002📐Tank Shape — Long Over Tall
Arrowana need horizontal swimming space. Tall, narrow "show" tanks are wrong — choose long, wide footprints.
Expert tips
- ✓Avoid hexagon, corner, or tall-column tanks
- ✓Rectangular with extra width (30"+) allows turns without bending
- ✓Shallow depth (24") is fine — surface access matters most
- ✓Rimmed tanks recommended — rimless glass can crack from impact
003🔒Tight Lid — MANDATORY
Arrowana are champion jumpers. An open tank WILL end in a dead fish on the floor. Heavy, locked, gap-free lid is non-negotiable.
Expert tips
- ✓Glass or acrylic lid weighing 5+ kg (cannot be knocked off)
- ✓Close ALL gaps — cord holes, heater slots, filter cutouts
- ✓Add weight bars or latches on top
- ✓A $1000 arowana on the floor is the #1 preventable death
004💧Filtration — Heavy Duty
Arrowana are messy eaters and produce huge bioload. Plan for 8-10× tank turnover per hour with oversized mechanical + biological filtration.
Expert tips
- ✓Sump filter is ideal — 30-50 gallon sump for 180 gal display
- ✓Canister filter rated 2× tank volume (minimum)
- ✓Heavy mechanical stage — food scraps produce waste fast
- ✓Large biomedia volume (ceramic rings, K1) for stable nitrogen cycle
Bright overhead lighting stresses arrowana and can cause "drop eye" from looking down constantly. Subdued, ambient light is better.
Expert tips
- ✓Low-intensity LED, cool white or blue-white
- ✓8-10 hours on, rest dark
- ✓Avoid direct spotlights pointing into the tank
- ✓Ambient room light is often enough — arowana are not plant-dependent
006🪨Decoration — Minimal, Smooth
Keep the tank open. Arrowana are fast turners and can injure themselves on sharp decor. One large driftwood or smooth rock is enough.
Expert tips
- ✓One large, smooth driftwood piece (optional)
- ✓No sharp rocks, no small ornaments
- ✓Leave 80%+ of tank as open swimming space
- ✓Large plants (Anubias, Java Fern) on back corners only
007⬛Background — Black for Color
A black or dark background darkens the fish background and intensifies arowana colors — especially important for Red Asian and Golden.
Expert tips
- ✓Black vinyl background on back glass
- ✓Enhances red/gold scale reflectivity
- ✓Reduces stress from side-tank reflections
- ✓Also hides equipment (heaters, filter intakes)
008🔥Heater — Protected, Large Wattage
Arrowana prefer 78-82°F (26-28°C). Use a heater guard — unguarded glass heaters can crack or burn the fish. Choose 300-500W for a 180 gal tank.
Expert tips
- ✓300W+ per 100 gallons, with heater guard
- ✓Titanium heater + external controller is safest
- ✓Install 2 smaller heaters instead of 1 big one (redundancy)
- ✓Target 80°F (27°C) is the sweet spot
009🌊Water Flow — Moderate
Arrowana prefer calm surface water. Too much flow stresses them and can contribute to fin damage. Direct returns to the side walls, not the surface.
Expert tips
- ✓Moderate flow, 4-6× tank turnover per hour (beyond filtration)
- ✓Avoid wavemakers pointing at fish
- ✓Surface agitation is good but should not be choppy
- ✓Calm water preserves fin integrity
010🏥Quarantine Tank — Required for Tankmates
Always QT new tankmates for 2-4 weeks before adding to an arowana tank. Arowana are expensive — one parasite outbreak can kill a $1000+ fish.
Expert tips
- ✓30-75 gallon bare-bottom QT
- ✓2-4 weeks observation, prophylactic treatment
- ✓Especially important when adding Datnoids, rays, or new arowana
- ✓Never skip QT for wild-caught or retail-store fish
011🌡️Temperature — 78-82°F (26-28°C)
Tropical species. Stable warmth is key. Avoid swings of more than 2°F per day.
Expert tips
- ✓Target 80°F (27°C)
- ✓Range: 78-82°F (26-28°C)
- ✓Spawning temp for Asian arowana: 82-84°F (28-29°C)
- ✓Never drop below 75°F (24°C) — immune suppression
012🧪pH — Slightly Acidic to Neutral
Wild arowana habitat is blackwater, slightly acidic. Aquarium fish adapt to 6.5-7.5. Stability matters more than the number.
Expert tips
- ✓Target pH 6.8-7.2
- ✓Asian arowana prefer slightly lower (6.5-7.0)
- ✓Stable pH matters more than exact number
- ✓Use driftwood to naturally lower and stabilize
013💎Water Hardness — Soft to Medium
Arrowana prefer soft to medium water. GH 5-12. Extremes in either direction cause scale and fin issues over time.
Expert tips
- ✓GH: 5-12 dGH
- ✓KH: 3-8 dKH (enough to buffer pH)
- ✓Very hard water (GH 20+) can cause scale lift long-term
- ✓RO water with remineralization is ideal for breeders
014💀Ammonia — Always Zero
Arrowana are ammonia-sensitive due to large gill surface area. Any detectable ammonia causes gill damage and "gill curl."
Expert tips
- ✓Ammonia MUST be 0 ppm at all times
- ✓Test weekly for first 3 months of a new tank
- ✓Ammonia spikes cause gill curl — irreversible
- ✓Emergency: Prime/Seachem Stability + 50% water change
015⚠️Nitrite — Always Zero
Nitrite damages blood oxygen transport. Arowana show stress within hours of nitrite exposure.
Expert tips
- ✓Nitrite MUST be 0 ppm
- ✓If detectable: immediate 50% water change
- ✓Test monthly once cycle is stable
- ✓Add biomedia if nitrite keeps appearing
016📉Nitrate — Under 20 ppm
Keep nitrate low. High nitrate (40+ ppm) dulls arowana colors, especially Red and Golden Asian varieties.
Expert tips
- ✓Target under 20 ppm
- ✓Over 40 ppm visibly dulls red/gold coloration
- ✓Weekly 30% water change is the key tool
- ✓Live plants in sump help — floating plants especially
017🚰Water Changes — 30% Weekly
Arrowana bioload is huge. Weekly 30% changes are the baseline. Bigger tanks (300+ gal) can stretch to bi-weekly if nitrate stays under 20 ppm.
Expert tips
- ✓30% weekly for 180-gal tanks
- ✓20% bi-weekly for 300+ gal tanks with heavy filtration
- ✓Match temperature within 1-2°F when refilling
- ✓Dechlorinate — Prime/SafeGuard
018🫧Oxygen — Surface Agitation + Airstone
Arrowana have an air-breathing organ (swim bladder) but still need dissolved oxygen in water. Surface agitation plus an airstone is the safest setup.
Expert tips
- ✓Spray bar or return flow angled at surface
- ✓Additional airstone if tank is heavily stocked
- ✓Low-oxygen symptoms: gasping at surface, reduced appetite
- ✓Surface film (oily, stagnant) kills gas exchange — wipe it
Total Dissolved Solids reflects overall water mineral content. Moderate levels (150-300 ppm) are healthiest for arowana.
Expert tips
- ✓Target 150-300 ppm
- ✓Under 100 ppm: too pure, may stress fish
- ✓Over 500 ppm: too mineralized, scale issues
- ✓TDS creeps up between water changes — track it
020🔬Water Testing — Weekly
Test ammonia, nitrite, nitrate, and pH weekly minimum. Liquid kits (API Master) are more accurate than strips.
Expert tips
- ✓Weekly test: NH3, NO2, NO3, pH
- ✓Monthly: GH, KH, TDS
- ✓API Freshwater Master Kit is reliable
- ✓Log readings — trends matter more than single numbers
021🥩Arrowana Are Carnivores
Arrowana are apex predators. Their diet is 100% animal protein. No flakes, no pellets alone — live/frozen meaty foods dominate.
Expert tips
- ✓Protein-based diet: insects, shrimp, fish, worms
- ✓Never feed vegetable matter
- ✓Pellets are SUPPLEMENTARY, not main diet
- ✓Vary the diet for full nutrition
022🚫NEVER Feed Goldfish or Minnows
Feeder goldfish and rosy reds contain THIAMINASE, which destroys vitamin B1. Long-term feeding causes neurological damage and death.
Expert tips
- ✓Goldfish feeders → thiaminase → B1 deficiency → death
- ✓Also avoid: rosy red minnows, carp species
- ✓Safe live fish: guppies (bred clean), livebearers, shiners
- ✓Disease risk from feeder goldfish is also massive
023🦗Staple Foods — Insects, Shrimp, Worms
The best staples are crickets, grasshoppers, mealworms (sparingly), earthworms, and shrimp. These are nutritionally dense with natural carotenoids.
Expert tips
- ✓Crickets: excellent primary food
- ✓Market shrimp (head/shell on): calcium + color enhancer
- ✓Earthworms: high protein, clean if cultured
- ✓Rotate staples — no single food forever
024⏰Feeding Frequency — By Size
Juveniles eat often; adults eat less. Overfeeding causes drop eye, fatty liver, and poor water quality.
Expert tips
- ✓Fry (<6"): 3-4 small meals daily
- ✓Juvenile (6-12"): 2 meals daily
- ✓Subadult (12-18"): 1 meal daily
- ✓Adult (18"+): every other day, 3-4×/week
025👁️Portion Size — Eye-Sized Pieces
A rule of thumb: each piece of food should be roughly the size of the arowana eye. Larger chunks are fine for adults but not more than the stomach can handle.
Expert tips
- ✓Piece = eye-sized reference
- ✓Adult stomach ≈ 5-8% of body weight per feeding
- ✓Fish should have slight belly bulge, not a balloon
- ✓Stop feeding when interest fades — no force feeding
026🟤Pellets — Supplementary Only
Quality arowana pellets (Hikari, New Life Spectrum, Tetra) are convenient but should never be the sole diet. Use 1-2× per week as fill-in.
Expert tips
- ✓Hikari Arowana, NLS Hex Shield, Tetra Arowana
- ✓Soak pellets before feeding (swells in-air, not in stomach)
- ✓Max 30% of total diet
- ✓Color-enhancing pellets boost red/gold tones
027🌈Color-Enhancing Foods
Carotenoid-rich foods (krill, shrimp with shell, crickets gut-loaded with carrots) intensify red and gold scales in Asian arowana and Golden varieties.
Expert tips
- ✓Shell-on shrimp — natural astaxanthin
- ✓Krill: highest carotenoid content
- ✓Gut-load crickets with carrots and spirulina 24h before feeding
- ✓Color effects visible within 4-8 weeks of consistent feeding
028🔬Live Food Safety — Culture or Trusted Source
Live food is the fastest way to introduce disease. Only feed live food you cultured yourself or sourced from a verified clean supplier.
Expert tips
- ✓Wild-caught feeders → parasites, bacteria, Argulus
- ✓Cultured mealworms, crickets, earthworms: safe
- ✓Freeze wild-sourced food 48h before feeding (kills most parasites)
- ✓Rinse all live foods before adding to tank
029🧊Frozen Food — Convenient and Safe
Frozen silversides, krill, smelt, prawn, and mysis are arowana staples. Freezing kills parasites, and storage is long.
Expert tips
- ✓Hikari frozen silversides, krill, bloodworms (adult size)
- ✓Always thaw in cold water before feeding
- ✓Rinse off freezer juice (adds phosphates to tank)
- ✓Do not refreeze thawed food
030🕐Fasting Days — Once Weekly for Adults
Adult arowana benefit from one fasting day per week. Prevents bloat, fatty liver, and drop eye from overfeeding.
Expert tips
- ✓1 fast day per week for adults
- ✓Gives GI tract time to clear
- ✓Reduces water quality stress
- ✓Fish will not starve — apex predators in wild eat sparingly
Most arowana keepers run single-fish tanks. Tankmates add risk: injury, territorial fights, disease introduction, and food competition.
Expert tips
- ✓Single-fish setup = longest, lowest-risk arowana life
- ✓Arrowana do not need companions to thrive
- ✓Watch your fish, not the community — that is the joy
- ✓If you want a community, start with a different species
033🎯Datnoids — Classic Dither Fish
Indonesian datnoids (Siamese tiger fish) are the classic arowana companion. They swim mid-water, flash bright stripes, and are robust enough to match.
Expert tips
- ✓3-bar Siamese tigers, 4-bar Indo tigers, or NTT
- ✓Add young together — adults fight
- ✓Feed separately to avoid food competition
- ✓Datnoids need warm, soft water — matches arowana
034🟠Freshwater Stingrays — Bottom Partner
Freshwater rays (Potamotrygon) use the bottom, arowana use the top — different zones work well. But rays need EXTREME water quality and large footprint.
Expert tips
- ✓Motoro, Black Diamond, Hystrix, Pearl rays
- ✓Bottom footprint: 24" × 60" minimum
- ✓Near-zero nitrate, stable parameters, tons of filtration
- ✓Rays are more demanding than arowana — expect $$$
Any fish smaller than the arowana head is food. Tetras, rasboras, livebearers, small plecos, cichlids under 6" — all get eaten.
Expert tips
- ✓Minimum tankmate size: 8" in juvenile arowana tanks
- ✓Adult arowana can swallow a 6-8" fish
- ✓Never trust "it is too big to fit" — fish jaws unhinge
- ✓If you can put it in the mouth, it will go
Arrowana have large trailing fins that hang like banners. Fin-nipping species (tiger barbs, Geophagus cichlids, some cats) will damage them permanently.
Expert tips
- ✓No tiger barbs, no serpae tetras, no angelfish
- ✓Damaged arowana fins heal slowly, often imperfectly
- ✓Plecos can suck arowana slime at night — L-cats only (no commons)
- ✓Aggressive Geophagus will pester arowana
037⬆️AVOID Other Top-Dwellers
Two top-dwelling species in one tank cause constant surface fights. Gars, bichirs, and second arowana are major problems.
Expert tips
- ✓No second arowana (except breeding pair attempts)
- ✓Gars fight for surface territory — bad match
- ✓Bichirs: possible, but size-matched and in large tanks only
- ✓Surface zone must belong to ONE species
038✅Suitable Tankmates — Short List
Realistic options that work in 300+ gal tanks with planning: large plecos (L-series), large cats (redtails NO, Pims YES), datnoids, freshwater rays, Geophagus (large-tank), silver dollars (large schools).
Expert tips
- ✓Large L-series plecos (not common plecos — slime risk)
- ✓Pimelodus, Phractocephalus (redtail only in 500+ gal)
- ✓Datnoids — classic pairing
- ✓Silver dollars in schools of 10+ — fast, robust
039⚖️Pair at Similar Size
If you must mix, all fish should be within 30% size of the arowana. Large arowana will bully much smaller tankmates; tiny ones get eaten.
Expert tips
- ✓Introduce all fish at similar size (young together)
- ✓Never add a small new fish to an established large arowana tank
- ✓Size gap grows — arowana grows 1-2 ft in 2 years
- ✓Re-home tankmates that grow too slowly
040👁️🗨️First-Week Observation
The first 7 days determine whether a pairing works. Watch for fin damage, stress flushing, food refusal. Have a QT tank ready to remove any failing fish.
Expert tips
- ✓Watch every feeding for 1 week straight
- ✓Signs of failure: hiding, dark stress coloring, torn fins
- ✓Remove aggressor, not victim, if possible
- ✓Most failures happen within 72 hours
041🔴Asian Red Arowana — The Crown Jewel
Super Red arowana (Scleropages formosus, Indonesian Red) is the most prized aquarium fish on earth. Deep red scales, expensive, CITES-regulated, microchipped.
Expert tips
- ✓Wild habitat: West Kalimantan, Indonesia
- ✓Colors develop 18-36 months — cr back, red scales, red fins
- ✓CITES Appendix I — requires paperwork and microchip ID
- ✓Price: $1,500-$15,000+ depending on grade and age
042🟡Asian Golden Arowana (Crossback)
Malaysian Golden Crossback is the second-most-prized Asian arowana. Gold scales across the back (5th row), metallic gold body, blue base. CITES-regulated.
Expert tips
- ✓Grades: Blue Base, Purple Base, Gold Base
- ✓Crossback means gold extends across row 5-6
- ✓Malaysian bloodlines are purest
- ✓CITES Appendix I — requires certificate
The most common Asian arowana variety. Greenish-silver body, affordable entry to Asian arowana keeping. Still CITES-regulated.
Expert tips
- ✓Green-silver body, darker grey back
- ✓Most affordable Asian arowana: $150-$500
- ✓Still requires CITES certificate
- ✓Good species for learning Asian arowana care
Banjar Red is a lower-grade red-tinged Asian arowana from Banjarmasin, Borneo. Sometimes sold as Super Red by dishonest sellers — buyer beware.
Expert tips
- ✓Orange-red tint, lighter than Super Red
- ✓Color develops partially, never fully
- ✓Common scam: sold as "Super Red" at young age
- ✓Legitimate Banjar: $300-$800
045⚪Silver Arowana — Most Available
Osteoglossum bicirrhosum from South America. Silver body, long trailing fins, 3 ft adult size. Not CITES — legal worldwide. The workhorse arowana.
Expert tips
- ✓Silver body, graceful trailing fins
- ✓Grows 2-3 ft in captivity
- ✓No CITES restriction — globally legal
- ✓Price: $30-$150 juvenile
046⚫Black Arowana — Rare South American
Osteoglossum ferreirai from Rio Negro, Brazil. Juveniles have bright yellow tail edge and blue body; adults turn all silver-black. Challenging to keep.
Expert tips
- ✓Juvenile: blue body + yellow stripe + black tail edge
- ✓Adult: silver-black, loses juvenile coloring
- ✓Needs very soft, acidic water (pH 5.5-6.5)
- ✓More delicate than Silver arowana
047🟤Jardini Arowana (Australian Pearl)
Scleropages jardinii from Northern Australia and New Guinea. Brown-olive body with pearl spots on every scale. Smaller (24-30") and more aggressive.
Expert tips
- ✓Brown-bronze body, pearl dot on each scale
- ✓Adult size: 24-30" (smaller than Silver)
- ✓Extremely aggressive — solitary recommended
- ✓Not CITES-regulated — available worldwide
048🟥Leichardti Arowana (Spotted Barramundi)
Scleropages leichardti from Eastern Australia. Similar to Jardini but with red/orange spots instead of pearl. Aggressive like Jardini. "Southern Saratoga."
Expert tips
- ✓Red-orange spots on scales and fins
- ✓Adult size: 24-32"
- ✓Very aggressive — tank-busting personality
- ✓Also called Southern Saratoga
049🟫African Arowana (Heterotis)
Heterotis niloticus from the Nile basin. Not a true arowana but a close relative. Filter feeder (unique!), darker silver body, grows to 3 ft. Rare in the hobby.
Expert tips
- ✓Nile basin native, plankton filter feeder
- ✓Completely different feeding style — accepts flakes and pellets
- ✓Grows 3 ft, very rare in the trade
- ✓Price: $200-$500 — hard to find
050🤔Choosing Your Variety
Your choice depends on budget, tank size, legal status, and experience. Silver is the best entry; Asian Red is the pinnacle. Match variety to your setup.
Expert tips
- ✓Beginner: Silver arowana ($30-$150)
- ✓Intermediate: Jardini, Black, Golden Asian
- ✓Expert / collector: Asian Red, Golden Crossback
- ✓Match tank size to adult size — Silver 8 ft min
051👀Drop Eye — The #1 Arowana Issue
Drop Eye is the permanent downward tilt of the arowana eye, caused by looking down at the tank bottom, fat deposits, or genetics. Prevention is critical.
Expert tips
- ✓Causes: looking at bottom reflections, overfeeding, genetics
- ✓Prevention: subdued top light, no strong bottom lights, clean bottom
- ✓Cover tank bottom glass (ping pong balls float, hide reflection)
- ✓Surgery exists but often fails — prevent, do not treat
052😖Gill Curl — Ammonia Damage
Gill curl is irreversible outward curling of the gill covers (operculum), caused by poor water quality during growth. Permanent, untreatable.
Expert tips
- ✓Cause: ammonia, nitrite, low oxygen during growth phase
- ✓Visible as outward-curled operculum edges
- ✓Prevention: excellent filtration, frequent water changes
- ✓Juveniles most vulnerable (first 12 months)
053〰️Tail Curl — Tank Too Small
Tail curl (bent spine, curved tail) usually comes from keeping a growing arowana in too-small a tank. Damage becomes permanent after months.
Expert tips
- ✓Cause: tank too short, fish turns constantly
- ✓Prevention: tank 1.5× body length minimum, always
- ✓Often irreversible if not caught early
- ✓Upgrade tank size BEFORE fish shows curving
Arrowana jump. If they hit an open lid, cracked glass, or the floor, injuries range from bruised jaw to broken spine to death. This is the #1 lost-fish cause.
Expert tips
- ✓Lock the lid — 100% prevention
- ✓Common injury: bruised/split lower jaw from hitting underside of lid
- ✓Check lid gaps monthly — pythons find any opening
- ✓A jumped arowana survives 30-60 min max on the floor
055🦴Fin Rot — Water Quality
Fin rot appears as ragged, whitish, or bloody fin edges. Bacterial infection driven by poor water quality or physical damage.
Expert tips
- ✓Cause: poor water, cuts from decor, tankmate bites
- ✓Treatment: clean water, Melafix / Pimafix / API Fin & Body Cure
- ✓Remove cause first, treat second
- ✓Severe cases need broad-spectrum antibiotic (kanamycin)
056⚪Ich (White Spot) — Treatable
Ich (ichthyophthirius) appears as white spots on body and fins. Extremely common, treatable with heat + salt or medication.
Expert tips
- ✓Symptoms: white spots, flashing against objects
- ✓Treatment: raise temp to 86°F (30°C), add aquarium salt 1 tsp/gal
- ✓Or meds: API Super Ich Cure (follow dose carefully)
- ✓Run treatment 10-14 days to break life cycle
057🕳️Hole-in-the-Head Disease
HITH/HLLE appears as pitting around the head and lateral line. Caused by Hexamita parasites, poor diet, or stray voltage. Serious but treatable.
Expert tips
- ✓Symptoms: small pits/holes on head, lateral line erosion
- ✓Cause: Hexamita + poor diet + carbon-stripped water
- ✓Treatment: Metronidazole in food + clean water + nutrition
- ✓Stop running activated carbon during treatment
Dropsy is bloating with raised scales ("pinecone look"), indicating organ failure or severe infection. Prognosis is poor but not zero.
Expert tips
- ✓Symptoms: bloated body, scales sticking out, lethargy
- ✓Cause: internal bacterial infection, kidney failure
- ✓Treatment: Kanamycin + Epsom salt, isolate in QT
- ✓Often fatal — aggressive early treatment is key
059🪱External Parasites (Argulus, Lernaea)
Argulus (fish lice) and Lernaea (anchor worm) are visible external parasites from feeder fish or pond-sourced plants. Treatable but annoying.
Expert tips
- ✓Visible as small spots (Argulus) or stuck worms (Lernaea)
- ✓Treatment: Dimilin, API General Cure, or manual removal (sedation)
- ✓Prevention: QT all new fish and plants, avoid wild feeders
- ✓Can devastate an arowana in weeks if untreated
060🍍Scale Lift & Pinecone
Scale lift (pinecone look) is a serious symptom of internal bacterial infection, organ failure, or extreme water quality issues. Act immediately.
Expert tips
- ✓Raised scales = internal problem, not skin problem
- ✓Emergency water change + Epsom salt + Kanamycin
- ✓Test all water parameters immediately
- ✓Often fatal if symptoms advanced — catch early
061🦘Jumping — Natural Hunting Behavior
Arrowana evolved to jump out of water to catch insects and small birds. Aquarium arowana retain this instinct — triggered by overhead shadows, startle, or full belly.
Expert tips
- ✓Jumping peaks at dusk/dawn
- ✓Triggers: overhead movement, sudden lights, loud noise
- ✓Prevention: secure lid, no fast moves near tank
- ✓Never skip the lid — instinct cannot be trained out
Arrowana are intelligent and recognize their owner after a few months. They approach the feeder and may "beg" (swim to surface, wiggle).
Expert tips
- ✓Recognition develops in 2-4 months
- ✓Arrowana may ignore strangers approaching the tank
- ✓Food-associated recognition — not emotional bond
- ✓Speaking/tapping on glass establishes routine
063🛡️Territorial Behavior
Arrowana claim the entire upper half of the tank. Other arowana or top-dwellers will be chased, bitten, and possibly killed.
Expert tips
- ✓Top territory: always arowana
- ✓Mid/bottom fish usually OK if large enough
- ✓Second arowana in a tank: 90% chance of fatal fight
- ✓Exception: large breeding pairs in 500+ gal, carefully introduced
064🪷Fin Flaring — Territorial Display
Arrowana flare their fins wide when displaying to rivals, during feeding excitement, or when stressed. A natural, dramatic behavior.
Expert tips
- ✓Full fin extension — all 7 fins wide
- ✓Courtship, territorial dispute, or showing off
- ✓Occasional flaring = healthy
- ✓Constant flaring at reflection = stress (remove cause)
065💤Sleep Patterns — Tilted Rest
Arrowana rest at night by hovering near the surface, often slightly tilted. This is normal and should not be mistaken for illness.
Expert tips
- ✓Rest near surface, slight tilt is normal
- ✓Fish still alert — twitches when disturbed
- ✓Turn off bright lights at night
- ✓If fish stays tilted with no reaction = problem
066🪞Mirror Fighting — Reflections
Arrowana see their own reflection in tank glass (especially with black background + external lights). They may attack it constantly, causing stress and fin damage.
Expert tips
- ✓Black background often helps (less reflective)
- ✓Reduce external room lights near tank
- ✓Add a tankmate (dither) to break reflection focus
- ✓Persistent mirror fights damage lips and fins
Arrowana strike fast — the ambush approach. Food disappears in a single upward slash. Weak feeding response signals illness or old tank.
Expert tips
- ✓Normal: swift strike, 1-second swallow
- ✓Slow: new tank (wait 2-4 weeks to adjust)
- ✓No response: water quality, illness, or stress — investigate
- ✓After feeding, fish returns to slow cruise
Long-term arowana form a routine relationship with their keeper. They "beg" at feeding time, approach when owner sits by tank, and become calm with voice.
Expert tips
- ✓Bonding strengthens over years
- ✓Talk to your fish during tank maintenance
- ✓Consistent feeding time (same hour daily)
- ✓Do not rearrange tank often — arowana dislike change
069🚨Stress Signs — Watch Daily
Key stress signs: dark coloration, clamped fins, hiding behind decor, refusing food, gasping at surface. Observe daily to catch issues early.
Expert tips
- ✓Dark body, clamped fins = stressed
- ✓Gasping at surface = low oxygen or gill issue
- ✓Refusing food 3+ days = serious
- ✓Daily visual check takes 30 seconds — do it
Arrowana are most active at dawn and dusk. They rest at night but jump unpredictably — lid must be secure even when lights are off.
Expert tips
- ✓Active periods: dawn and dusk (crepuscular)
- ✓Night rest is partial — still awake enough to jump
- ✓Leave blue moonlight if you want to observe nightcamera
- ✓Never assume "sleeping" arowana will not jump
071📜CITES — International Regulation
Asian arowana (Scleropages formosus) is CITES Appendix I — highest endangered status. International trade is banned except for certified captive-bred fish with microchip ID.
Expert tips
- ✓CITES Appendix I = endangered
- ✓Wild catch / trade = illegal worldwide
- ✓Captive-bred only, with CITES certificate
- ✓Import requires receiving country permit
072💳Microchip Identification
Every legally traded Asian arowana has an implanted microchip (PIT tag) linked to its CITES certificate. Verify scan before buying.
Expert tips
- ✓Microchip inserted behind dorsal fin at farm
- ✓Scannable with standard PIT tag reader
- ✓Chip ID must match CITES certificate number
- ✓No chip = no legal ownership = do not buy
073🌐Legal Status by Country
Asian arowana legal in: Singapore, Malaysia, Indonesia, Japan, Hong Kong, Thailand, and most of Southeast Asia. Banned in: USA (all Asian arowana), some EU countries.
Expert tips
- ✓USA: federally banned — Lacey Act + ESA
- ✓UK: legal with CITES paperwork
- ✓Germany: legal with paperwork
- ✓Check local laws before buying — rules change
074🎨Color Development — 18-36 Months
Asian arowana juveniles are pale. Color develops slowly from 6 months to 3 years. Reds intensify, gold crosses over, blues deepen.
Expert tips
- ✓6 months: first color hints
- ✓18 months: major color breakthrough
- ✓24-36 months: near-final color grade
- ✓Post-36 months: colors keep refining for another 2-3 years
Super Red / Chili Red / Blood Red / Orange Red / Banjar Red — grading is based on red depth, coverage, scale framing, and pectoral fin color.
Expert tips
- ✓Super Red / Chili Red: top tier — deep red with framing
- ✓Blood Red: uniform rich red
- ✓Orange Red: lighter red-orange
- ✓Banjar Red: lowest — orange tint, often sold as mid-grade
076🥇Golden Crossback Grades
Gold arowana grades: Gold Base > Purple Base > Blue Base > Green Base. Crossback means gold reaches row 6. Non-crossback (Red Tail Golden) is different.
Expert tips
- ✓24K Gold Base — rarest, most prized
- ✓Purple Base — highly valued
- ✓Blue Base — common high grade
- ✓Crossback = row 6 gold; non-crossback = partial gold
077🏭Farm Origin — Certified Breeders
Legal Asian arowana comes from licensed captive breeders in Indonesia (Red), Malaysia (Crossback), and Singapore. Buy from certified retailers only.
Expert tips
- ✓Indonesian Red: West Kalimantan farms
- ✓Malaysian Gold: Bukit Merah, Selangor
- ✓Singapore farms: Qian Hu, Xian Leng, Dragon Fish Industry
- ✓Paperwork must trace to the farm
Do not buy Asian arowana from private sellers, online-only shops without papers, or suspiciously cheap deals. Scams are everywhere.
Expert tips
- ✓Visit the shop in person if possible
- ✓Scan the microchip yourself (or watch)
- ✓Review CITES certificate — numbers must match
- ✓Low prices on Asian Red = 99% chance it is Banjar or fake
079💄Color Enhancement — Legitimate Methods
Real color enhancement comes from: diet (carotenoid-rich food), proper lighting, tank setup (black background), patience. NOT hormones.
Expert tips
- ✓Diet: shrimp, krill, color pellets
- ✓Light: 8-10 hr moderate lighting
- ✓Tank: black background, clean water
- ✓Hormones: illegal, damages long-term color and health
080⚠️Hormone-Injected Fish — AVOID
Some unethical sellers inject young arowana with hormones to fake premature red/gold color. Color fades after months, leaving a damaged fish.
Expert tips
- ✓Too-red juveniles (under 12") = suspicious
- ✓Color will fade in 6-12 months, exposing the scam
- ✓Injected fish often die young from hormone damage
- ✓Buy from farms with reputation, not flash sellers
081📅Lifespan — 10 to 20 Years
Arrowana in captivity live 10-20 years with proper care. Commitment equals dog or large parrot ownership.
Expert tips
- ✓Silver: 10-15 years
- ✓Asian Red/Gold: 15-20+ years
- ✓Think "lifetime pet" before buying
- ✓Have a succession plan (family/friend/aquarium)
082📈Growth Rate — Fast First 2 Years
Juvenile arowana grow 1-2 inches per month for the first 18-24 months. After that, growth slows to 2-4 inches per year.
Expert tips
- ✓Year 1: 6" → 18"
- ✓Year 2: 18" → 24"
- ✓Year 3+: 24" → 30" (slow)
- ✓Maximum size: 24-36" depending on species
083🏗️Tank Upgrade Planning
A 6-month-old Silver arowana fits a 75 gal. By year 1 it needs 125 gal, by year 2 it needs 180+ gal. Plan upgrades before you need them.
Expert tips
- ✓Month 0-6: 75-125 gal OK
- ✓Year 1: 125-180 gal
- ✓Year 2+: 180-300 gal permanent
- ✓Have the final tank installed by month 18
Arrowana thrive on routine: same feeding time, same water change day, same lighting schedule. Dramatic changes trigger stress.
Expert tips
- ✓Feed at the same time daily
- ✓Water changes on the same day each week
- ✓Lights on/off at the same times
- ✓Reduce tank rearrangement to max once per year
085✈️Vacation Care — Plan Ahead
Adults can go 5-7 days without food. Beyond that, arrange a trusted feeder OR auto-feeder. Water changes must continue for trips over 2 weeks.
Expert tips
- ✓3-5 day trip: no feeder needed
- ✓1-2 week trip: trusted helper for feeding
- ✓2+ week trip: helper for water changes too
- ✓Auto-feeders risky for arowana — use frozen/pellet pre-portions
086🔌Power Outage — Emergency Prep
Arrowana can survive hours without filtration but not days. Have battery airstones and know emergency protocols for long outages.
Expert tips
- ✓Battery-powered airstone (cheap, essential)
- ✓Minimum 1 day backup battery for filter
- ✓Heating pad or insulation for cold snaps
- ✓Emergency plan: water change from pre-aged water buckets
Relocating a large arowana tank is a major project. Fish in a heated foam-insulated container, tank drained, equipment moved separately. Not a one-person job.
Expert tips
- ✓Fish in 5-gal insulated tub with airstone
- ✓Drain tank fully, move empty, refill at destination
- ✓Keep old filter media wet — re-seed new setup
- ✓Hire help — 180-gal tank weighs 500 lbs empty
088🔧Equipment Replacement Schedule
Filter impellers, heaters, LED lights, airstones all have lifespans. Replace proactively before failure to avoid emergencies.
Expert tips
- ✓Heater: 2-3 years (replace as precaution)
- ✓Filter impeller: 3-5 years
- ✓LED bulbs: 3-5 years
- ✓Airstones: every 6 months
Keep a log of water parameters, feedings, changes, and observations. Long-term trends reveal issues before they become emergencies.
Expert tips
- ✓Weekly log: NH3, NO2, NO3, pH, temp
- ✓Monthly: weight/length if possible
- ✓Photo monthly to track color development
- ✓Log helps diagnose when something is off
090💰Insurance & Valuation
High-value arowana (Red, Golden Asian) can be insured like jewelry. Keep receipts, CITES cert, photos with microchip scan proof for claims.
Expert tips
- ✓Specialized pet/exotic insurance exists
- ✓Keep all paperwork organized
- ✓Annual photo records for claim documentation
- ✓Insurance rarely worthwhile for Silver (low value) but critical for Asian
091🎓Breeding Arrowana — Very Difficult
Arrowana breeding in home aquariums is extremely rare. Commercial farms use 1-acre mud ponds. Asian arowana breed only after 4-6 years.
Expert tips
- ✓Sexual maturity: 4-6 years
- ✓Paternal mouthbrooder — male carries eggs 50-60 days
- ✓Home breeding almost impossible — farms only
- ✓Hobbyists focus on raising, not breeding
092👄Mouthbrooding — Male Parental Care
Arrowana are paternal mouthbrooders. Males carry 30-100 eggs in their mouth for 50-60 days. Fry emerge fully formed.
Expert tips
- ✓Male carries eggs in mouth cavity
- ✓50-60 day incubation
- ✓Fry released as fully functional 3-4 inch juveniles
- ✓Male does not eat during brooding — may lose weight
093🏞️Asian Arowana Farm System
Asian arowana farms in Malaysia/Indonesia/Singapore use 1-5 acre mud ponds to mimic wild blackwater swamps. Natural spawning, human harvest.
Expert tips
- ✓Large mud ponds, natural vegetation
- ✓Multiple males and females stocked together
- ✓Staff harvest males carrying eggs every 2 months
- ✓Fry raised in indoor tanks after extraction
094📸Photographing Arrowana
Capturing arowana beauty requires polarizing filter, side lighting (not top), dark background, and patience. Top-light flash creates harsh reflections.
Expert tips
- ✓Polarizing filter cuts glass glare
- ✓Side lighting reveals scale dimensionality
- ✓Black background makes colors pop
- ✓No flash — use constant LED lights
095🏆Arrowana Shows & Competitions
Asia hosts major arowana beauty competitions — especially for Red and Golden varieties. Judges grade color, form, fin integrity, behavior, and size.
Expert tips
- ✓Major shows: Singapore, Malaysia, Indonesia, Thailand
- ✓Judging: color depth, scale symmetry, fin condition, confidence
- ✓Show tanks: clean, minimalist, with ideal lighting
- ✓Pre-show conditioning: 2-3 months of ideal diet + routine
096🐉Feng Shui & Cultural Symbolism
In Chinese culture, arowana (especially Red) symbolizes prosperity, power, and good luck. Many Asian households keep arowana for feng shui — "Dragon Fish."
Expert tips
- ✓Red Asian = wealth, prosperity
- ✓Gold Asian = power, success
- ✓Tank placement per feng shui: north or southeast
- ✓Cultural reverence drives high market value
097✈️Importing Arrowana Legally
Importing Asian arowana requires CITES export permit + destination country import permit + airline handling + quarantine period. Multi-month process.
Expert tips
- ✓CITES export (origin) + CITES import (destination)
- ✓Approved airline carrier for live fish
- ✓Quarantine on arrival — 2-6 weeks
- ✓Total cost: $2000-$5000 beyond fish price
098🌿Wild Habitat & Conservation
Wild Asian arowana is critically endangered. Habitat destruction (palm oil plantations, peat swamp drainage) and past over-collection wiped out wild populations.
Expert tips
- ✓Native range: Indonesia, Malaysia, Borneo, Sumatra
- ✓Habitat: blackwater swamps, slow rivers
- ✓Population crashed 70%+ in 20th century
- ✓Captive breeding saved the species from extinction
Sex determination in arowana is very difficult. Mature males are slightly slimmer with wider mouths (for brooding); females are fuller-bodied. Young fish nearly impossible to sex.
Expert tips
- ✓Juvenile: impossible to sex reliably
- ✓Adult male: slimmer, wider/deeper lower jaw
- ✓Adult female: fuller, gravid belly
- ✓DNA testing exists but expensive
100🧘Arrowana Keeper Philosophy
Keeping arowana is a long-term commitment to one majestic creature. Not a casual pet. The payoff is 15+ years with a fish that recognizes you, commands the room, and links to ancient Asian dragon mythology.
Expert tips
- ✓Patience: color and size develop over years
- ✓Dedication: routine water changes, diet, observation
- ✓Respect: this is the dragon fish of legend
- ✓Reward: lifelong relationship with a living myth