Nanophyetus salmincola is a small intestinal fluke that parasitizes fish-eating mammals and is associated with salmon poisoning disease. However, among the common intestinal flukes of large animals (cattle, sheep), Fasciolopsis buski is the classic intestinal fluke. Among the given options, Nanophyteus is listed as an intestinal fluke. Fasciola hepatica is a liver fluke, and Schistosoma is a blood fluke.