caribe

from WordNet (r) 3.0 (2006)

caribe
    n 1: small voraciously carnivorous freshwater fishes of South
         America that attack and destroy living animals [syn:
         {piranha}, {pirana}, {caribe}]

from The Collaborative International Dictionary of English v.0.48

Caribe \Ca*ri"be\, n. [Sp. a cannibal.] (Zool).
   A south American fresh water fish of the genus {Serrasalmo}
   of many species, remarkable for its voracity. When numerous
   they attack man or beast, often with fatal results.
   [1913 Webster]