Phycocharax

Phycocharax is a monospecific genus of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins.^[2] The only species in the genus is Phycocharax rasbora.^[3][1] This fish is endemic to the Brazilian Amazon, where it is only known from the upper Braço Norte River (Serra do Cachimbo region), a blackwater tributary in the Teles Pires basin, itself a part of the Tapajós basin.^[1] A dam has been built on the Braço Norte River and while the species is uncommon downstream, it is very abundant in the reservoir above.^[1]

Jaws

Phycocharax
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Acestrorhamphidae
Subfamily:	Hyphessobryconinae
Genus:	Phycocharax Ohara, Mirande & F. C. T. Lima, 2017[1]
Species:	P. rasbora
Binomial name
Phycocharax rasbora Ohara, Mirande & F. C. T. Lima, 2017[1]

Its species name refers to the similarity in color and pattern to Trigonostigma rasboras, an unrelated but well-known Asian fish.^[1] The mainly reddish males reach up to about 3.4 cm (1.3 in) in standard length, while the duller yellowish females reach up to about 3.1 cm (1.2 in).^[1]