Gymnocorymbus

Gymnocorymbus
Gymnocorymbus ternetzi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Acestrorhamphidae
Subfamily: Pristellinae
Genus: Gymnocorymbus
C. H. Eigenmann, 1908
Type species
Gymnocorymbus thayeri
C. H. Eigenmann, 1908

Gymnocorymbus is a genus of freshwater ray-finned fishes belonging to the family Acestrorhamphidae, the American characins. The fishes in this genus are found in the Amazon, Paraguay, Orinoco, Courantyne, Gurupí and Parnaíba river basins in South America. These tetras are popular in the aquarium trade.