Robuta

https://species.wikimedia.org/wiki/Arapaima_gigas Arapaima gigas - Wikispecies arapaima gigas wikispecies https://repository.si.edu/items/a9b8e889-c93a-41d3-9d4d-ae9b2d7cfb89/full Clarification of the Occipito-vertebral Region of Arapaima gigas (Osteoglossomorpha:... of the arapaima gigas clarification region