Ruivaco
(Achondrostoma oligolepis)
Achondrostoma oligolepis is a species of cyprinid fish. It is endemic to central and northern Portugal and known from between Limia and Tornada drainages, south of Douro. It occurs in the lower stretches of rivers and streams. It can grow to 25 cm (9.8 in) total length, although it typically measures about 15 cm (5.9 in) TL.
