Arapaima
Date 1898
Source Guide to the galleries of reptiles and fishes of the British Museum
Author W H Flower (Sir William Henry Flower KCB FRCS FRS, 1831 – 1899)
Source: https://commons.wikimedia.org/wiki/File:ArapaimaImg.jpg

The pirarucu or giant arapaima (Arapaima gigas) is a species of arapaima native to the basin of the Amazon River. It is among the largest freshwater fish. Arapaima gigas is an obligate air-breather and needs to come to the surface regularly to gulp air.