
Hydrocynus is a genus of large characin fish in the family Alestidae commonly called `tigerfish,` endemic to the African continent. The genus name is derived from Ancient Greek ὕδωρ (`water`) + κύων (`dog`). (In fact, this fish is popularly referred to as poisson chien (dog fish) in French-speaking West Africa.) The genus contains f...
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http://en.wikipedia.org/wiki/Hydrocynus

(from the article `tigerfish`) any of several fishes so named on the basis of their pugnacity when caught, their fiercely predaceous habits, or their appearance. In African ...
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http://www.britannica.com/eb/a-z/h/88
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