Blacktail Brycon

Brycon falcatus has a maximum standard length of 48.9 cm (19.3 in) for males and 49.5 cm (19.5 in) for females, and a maximum published weight of 2.7 kg (6.0 lb).

Brycon falcatus is widespread in rivers draining the Brazilian and Guiana Shields in the Amazon, Orinoco, and Guyanese river systems. It is also found in some scattered localities in the western part of the Amazon drainage basin. It is found in larger streams and rivers, where it is a long-distance migrant. The length and duration of the migration of this fish varies geographically. In the Orinoco it moves from blackwater, where they spend the dry season, into flooded forest in the wet season. In the Amazon it shows a preference for whitewater areas.

== References ==

Brycon falcatus is the type species of the genus Brycon. This name is derived from the Greek brýchō (βρύχω), which means "to bite", "gnash teeth" or "eat greedily", thought to be an allusion to the fully toothed maxillae of this species. The specific name, falcatus, means "sickle-shaped" in Latin, an allusion to the sickle-shaped black marking on the caudal fin.