Ichthyofauna of tributaries of the Vermelho River, upper Paraguay River basin, region of Rondonópolis, state of Mato Grosso, Brazil

With the aim of finding information on the composition of the ichthyofauna of streams belonging to the Upper Paraguay River basin, in the municipality of Rondonópolis, state of Mato Grosso (MT), Brazil, we present a list of species captured at eight localities from October 2010 to April 2012. Fish were captured with sieves for approximately one hour at each site and date. We list 39 species from four orders, 15 families and 32 genera. Characiformes was represented by 19 species, Siluriformes by 15 species, Gymnotiformes by three species and Perciformes by two species.