(Trichomycterus balios)
Trichomycterus balios is a species of pencil catfish endemic to Brazil, where it occurs in the upper portion of the Das Antas and Caí river basins (Laguna dos Patos system), and the Mampituba river basin, in the state of Rio Grande do Sul. This species reaches a maximum length of 10.1 centimetres (4.0 in) SL.