Vastres gigas = Arapaima gigas
1: skull, side
2: skull, top
3: lower jaw, side
4: vertebra, side
5: vertebra, front
Date 1856
Source
Français : Expédition dans les parties centrales de l'Amérique du Sud, de Rio de Janeiro à Lima et de Lima au Para sous la direction du Comte Francis de Castelnau , 1856
(exemplaire de la bibliothèque patrimoniale de Gray (France))
Author Francis de Laporte de Castelnau (1810–1880)
Source: https://commons.wikimedia.org/wiki/File:F_de_Castelnau-poissonsPl25.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.