Asian Arowana

Tank mates must be chosen with extreme care due to the Arowana’s size, territorial tendencies, and predatory nature. Fast, robust, mid-to-large species fare better than small or timid fish. Avoid anything bite-sized or overly aggressive.

Large bottom dwellers such as big catfish can coexist if the aquarium provides adequate space. Ensure that tank mates do not challenge the Arowana for territory or food. Compatibility varies by individual temperament and environmental stability.

Avoid keeping multiple Arowanas in confined aquariums. They often display intense dominance behaviors. Even similarly sized specimens may clash unexpectedly.

Monitor interactions closely after any introduction. Stress or injuries can escalate quickly. Separation plans must always be in place in case conflicts arise.

Asian Arowanas require large, well-planned aquariums that accommodate their significant size and active swimming style. They thrive in long tanks with strong structural support and a secure lid to prevent jumping. Stable, warm temperatures and pristine water quality play a central role in their long-term health.

A powerful filtration system is essential because these fish generate considerable biological waste. Regular water changes ensure nitrate buildup stays low, while maintaining gentle flow that does not stress the fish. Natural tannins from driftwood or leaves can help mimic their native waters.

Lighting should remain moderate to avoid stress while still displaying their colors. Aquascaping must prioritize open swimming areas, keeping decorations minimal and smooth to avoid injuries. Subdued surroundings support calm behavior and reduce sudden startle responses.

Long-term care also involves monitoring for common stress triggers. Consistent environmental parameters reduce the risk of disease. Proper oxygenation, reliable heating, and redundancy in life-support systems improve overall stability.

Attention to tank security is vital. Arowanas are powerful jumpers and can easily injure themselves. A tight-fitting, weighted lid prevents escapes and provides peace of mind.

Asian Arowanas are strict surface-feeding carnivores that rely heavily on movement to trigger feeding responses. They naturally consume insects, small fish, and crustaceans in the wild. An appropriate feeding routine must replicate this with safe, controlled alternatives.

A balanced diet can include high-quality pellets formulated for large carnivores. These should form the nutritional foundation and help prevent deficiencies. Occasional treats like insects or gut-loaded feeders may be added but never relied upon exclusively.

Frozen foods such as shrimp or fish fillets are safer than live prey. Using varied frozen offerings diversifies nutrient intake. Avoid fatty meats that can damage internal organs over time.

Feed moderately to avoid obesity. Young individuals eat more frequently, while adults benefit from controlled schedules. Leftover food should be removed promptly to maintain water quality.

Breeding Asian Arowanas in captivity is exceptionally challenging and rarely successful without large, specialized enclosures. They exhibit mouthbrooding behavior where males incubate eggs. This requires quiet surroundings and substantial space.

Courtship involves synchronized swimming and territory establishment. Pairs must be carefully matched, usually after long observation periods. Sudden disturbances can interrupt the bonding process entirely.

Once fertilized, the male gathers the eggs into his mouth. During this extended incubation period, he eats nothing and becomes highly defensive. Stable temperatures and minimal external stress are crucial.

Fry emerge after several weeks and remain near the male. In captivity, survival depends on controlled feeding and protected nursery environments. Replicating these conditions at hobbyist scale is extremely difficult.

For most aquarists, breeding remains impractical. The species’ large size, sensitivity, and legal restrictions further complicate attempts. Professional facilities with extensive resources are generally required.