The Asian Arowana is a difficult fish to breed, more so under glass tank orfibre glass pond conditions. It will only breed in natural, earth pondswhen they reaches maturity between ages 3-5, depending on colour variationand water conditions. Sexing them is difficult. However, the male's mouthis wider and deeper as the Asian Arowana is a male mouth brooder! Eachspawn will only yield 30-80 eggs and stays in the male's mouth for about5 weeks. Each egg is orange-red in colour and is very fragile. Pre-pawningbehavoir lasts 2-3 months, with both parents swim around the perimeterof the pond day and night

TheArowanas are territorial and aggressive fishes. Therefore, never keep 2-3fishes in a single tank. Instead, keep one alone or 6-10 together. Whenin a group, their aggressiveness tends to be subdued. Notorious as a greatjumper, care must be taken to place a heavy object on top of closed covers.They are known to grow up to 3 feet (90cm) in the wild and can weigh upto 7kg. They prefer neutral to slightly acidic, aged water (pH 6.5-7) anda temperature of 28-32 degree celsius. Depending on tank sizes and numberof fishes, it will be good to change 25% of the tank's water once or twice a week. Never conduct a 100% change in water as it is very sensitive to Chlorine and other chemicals/medications. Feed live or dead prawns, smallfishes, insects, frogs, etc., once or twice a day. For convenience, halfa kilo of fresh prawns from the market can be frozen into many smallerpackets and defrosted daily as required. As the Arowana is a surface dweller,when deciding on the size of the fish tank, depth is not so much a factorcompared to surface area and width. Young fishes of 6 inch (15cm) can bekept in tanks of 4feet by 1.5feet by 1.5feet(depth). Adult fishes of around1 feet (30cm) would be better off with a 6feet by 2feet by 1.5feet(depth)tank.