From top to bottom:
Vastres gigas = Arapaima gigas
Osteoglossum minus = Osteoglossum bicirrhosum
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-poissonsPl26.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.

The silver arowana (Osteoglossum bicirrhosum), sometimes spelled arawana, is a freshwater bony fish of the family Osteoglossidae, commonly kept in aquaria. The generic name Osteoglossum means "bone-tongued" and the specific name bicirrhosum means "two barbels" (from the Greek language).