- Source: Archolaemus santosi
Archolaemus santosi is a species of glass knifefish endemic to Brazil where it is found in the Rio Mucajaí and Rio Uraricoera in the north-eastern portions of the Amazon basin. This species reaches a length of 21.2 cm (8.3 in).
Etymology
The knifefish is named in honor of Geraldo Mendes dos Santos of the Instituto Nacional de Pesquisas da Amazônia, who collected the type specimen.