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Silver arowana

Picture of Silver Arowana

Photo taken at Wharf Aquatics

The picture above shows two semi-adult fish (at about 18"/45cm long) that had been raised together and appeared to be a pair - adults will not always share a tank peacefully in this way!
Photo © Sean Evans

Common name:Silver arowana
Scientific name:Osteoglossum bicirrhosum
Size:Usually 24-30" (60-90cm) in captivity, recorded up to 48" (120cm) in the wild.
Origin:Amazon river basin and the still waters of Guyana.
Tank setup:A very large tank (suggest 200 gallons/900 litres plus for an adult) with lots of open swimming space. A few branches or pieces of bogwood can be used for decor.
Compatibility:Highly predatory, can be aggressive.
Temperature:24-28oC (75-82oF)
Water chemistry:Soft and acidic (pH 6.0-6.9) ideally, well filtered.
Feeding:Will usually accept dead meaty foods such as cockles, mussels, prawns, whitebait etc, or even floating pellets.
Sexing:There may be differences in body depth.
Breeding:Large eggs are mouthbrooded by the male for about 2 months. The young remain in the mouth of the male until the yolk sac has been absorbed.
Comments: The aquarium should have a tight-fitting heavy cover, as these fish may jump. They can breathe air by utilising their swimbladder. Only the largest home aquaria are suitable for this fish.



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