Neusticomys is a genus of semiaquatic South American rodents in the family Cricetidae. It contains the following six species: \n* Ferreira's fish-eating rat (Neusticomys ferreirai) — Percequillo, Carmignotto & Silva, 2005 \n* Montane fish-eating rat (Neusticomys monticolus) — Anthony, 1921 \n* Musso's fish-eating rat (Neusticomys mussoi) — Ochoa G. & Soriano, 1991 \n* Oyapock's fish-eating rat (Neusticomys oyapocki) — (Dubost & Petter, 1978) \n* Peruvian fish-eating rat (Neusticomys peruviensis) — (Musser & Gardner, 1974) \n* Venezuelan fish-eating rat (Neusticomys venezuelae) — (Anthony, 1929)