Silver Arowana Osteoglossum bicirrhosum

The Silver Arowana is native to the Amazon basin and surrounding deep waters. It can reach around a metre in length and weigh some 6 kg.

In deep water depleted in oxygen, it is able to supplement intake by surfacing and breathing air through its mouth (to a modified swim bladder like lung tissue).

It has an upturned mouth as it takes large insects on the water surface or leaps up to 2 metres (6 feet) out of the water to prey on insects, small birds, bats and even marmosets.

A strange long triangular shape with prominent scales, it is closely related to the smaller Black Arowana also of the Amazon Basin.

It is sometimes called the Silver Dragonfish and is more distantly related to the Boneytongue Dragonfish, which is sometimes referred to as the "Golden/Asian Arowana".