Author Robert Hermann Schomburgk (1804–1865) https://en.wikipedia.org/wiki/Robert_Hermann_Schomburgk
Description
English: Cychla monoculus
Date 1860
Source Schomburgk, R. H. (1860) Fishes of British Guiana, Part II, Naturalist's Library, vol.40, Edinburgh, Scotland: W. H. Lizars
Source: https://commons.wikimedia.org/wiki/File:FMIB_38367_Cychla_monoculus.jpeg

Cichla monoculus, sometimes known as the tucanare peacock bass ("peacock bass" is also used for some of its relatives), is a very large species of cichlid, and a prized game fish. It is native to the Amazon basin in South America, but has also been introduced to regions outside its natural range (e.g., Florida and Hawaii). It reaches 80 cm in length and 9 kg in weight. Order: Perciformes, Family: Cichlidae, Subfamily: Cichlinae.