''Acanthocharax'' is a genus of fish in the family

Characidae Characidae, the characids, is a family of freshwater subtropical and tropical fish belonging to the order Characiformes. They are found throughout much of Central and South America, including such major waterways as the Amazon and Orinoco Riv ...

. It contains the single species ''Acanthocharax microlepis'', which is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Guyana Guyana, officially the Co-operative Republic of Guyana, is a country on the northern coast of South America, part of the historic British West Indies. entry "Guyana" Georgetown, Guyana, Georgetown is the capital of Guyana and is also the co ...

, where it is found in the

Essequibo River The Essequibo River (; originally called by Alonso de Ojeda; ) is the largest river in Guyana, and the largest river between the Orinoco and Amazon River, Amazon. Rising in the Acarai Mountains near the Brazil–Guyana border, the Essequibo flows ...

basin. It is found in fresh water at pelagic depths. This species is native to a tropical climate. This fish can reach a length of about 8.5 cm (3.3 in).

References

Characini Monotypic freshwater fish genera Freshwater fish of South America Fish of Guyana Endemic fauna of Guyana Fish described in 1912 {{Characidae-stub