The Collaborative International Dictionary of English v.0.48:
Piscivorous \Pis*civ"o*rous\, a. [L. piscis a fish + vorare to devour: cf. F. piscivore.] (Zool.) Feeding or subsisting on fish. [1913 Webster]WordNet (r) 3.0 (2006):
piscivorous adj 1: feeding on fishes