Acestrorhynchidae

Acestrorhynchidae is a family of freshwater fish in the order Characiformes, found in South America. Members of this family are known as freshwater barracudas (not to be confused with the unrelated true barracudas of the Sphyraenidae) and biting tetras.

Acestrorhynchus ("needle jaw" ) is a genus of freshwater ray-finned fishes belonging to the family Acestrorhynchidae. The fishes in this genus are found South America. It is the sole genus in the subfamily Acestrorhynchinae. Their greatest diversity is in the Orinoco and Amazon basins.