Pad·dle·fish n. Zool A large ganoid fish (Polyodon spathula) found in the rivers of the Mississippi Valley.  It has a long spatula-shaped snout.  Called also duck-billed cat, and spoonbill sturgeon.
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  Polyodon spathula
       n : primitive fish of the Mississippi valley having a long
           paddle-shaped snout [syn: paddlefish, duckbill]