Lebiasina is a genus of fishes found in tropical South America, where they inhabit well-oxygenated upland streams that originate in the Andes of Colombia, Ecuador and Peru, the Guianan Highlands in Brazil, Guyana and Venezuela, and Serra do Cachimbo in Brazil.

[1][2][3] The individual species tend to have relatively small ranges and the three species of Serra do Cachimbo, all restricted to the Curuá River basin,[3] are considered threatened by Brazil's Ministry of the Environment.

[4] They are elongated fish that reach up to 16 cm (6.3 in) in standard length.

[1] There are eighteen currently recognized species:[1][2]

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