Acestrorhynchus britskii is a species of fish in the family Acestrorhynchidae.

[1] It was described by Naércio Aquino de Menezes in 1969.

It inhabits the São Francisco river in Brazil.

It reaches a maximum standard length of 16.5 cm (6.5 in).

[1] The fish is named in honor of ichthyologist Heraldo A. Britski with the Departamento de Zoologia, Secretaria de Agricultura, in São Paulo, Brazil, who collected the type specimen.