Osteoglossum arowana
Subject: Osteoglossidae
Date 1852
Source/Photographer R. H. Schomburgk / Robert Hermann Schomburgk (1852) Fishes of British Guiana, Part I, Naturalist's Library, vol.39, Edinburgh, Scotland: W. H. Lizars
Author Robert Hermann Schomburgk (1804–1865)
Source: https://commons.wikimedia.org/wiki/File:FMIB_38624_Osteoglossum_arowana.jpeg

The silver arowana (Osteoglossum bicirrhosum) is a South American freshwater bony fish of the family Osteoglossidae. Silver arowanas are sometimes kept in aquariums, but they are predatory and require a very large tank. The generic name Osteoglossum means "bone-tongued" and the specific name bicirrhosum means "two barbels" (from the Greek language). This South American species is native to the Amazon, Essequibo and Oyapock basins.

Order: Osteoglossiformes
Family: Osteoglossidae
Genus: Osteoglossum
Species: Osteoglossum bicirrhosum Cuvier (ex Vandelli), 1829