The Stolzmann's crab-eating rat (Ichthyomys stolzmanni), is a species of crab-eating rat in the family Cricetidae. It is found in Ecuador and Peru. The species is believed to be nocturnal and semiaquatic, and has been found at an elevation range of 900 to 1700 m. A survey in 2010 indicates that it has become a pest at local fish farms.