Hyphessobrycon auca
Hyphessobrycon auca is a is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is found in Argentina, in the Iberá Wetlands.
Description
H. auca reaches a maximum length of.The species is very similar to the Buenos Aires tetra, with only subtle differences. It is slightly duller with less red on its fins and patchier black area at the base of the tail.