Source : Webster's Revised Unabridged Dictionary (1913)

Paddlefish \Pad"dle*fish`\, n. (Zo["o]l)
   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}.

Source : WordNet®

Polyodon spathula
     n : primitive fish of the Mississippi valley having a long
         paddle-shaped snout [syn: {paddlefish}, {duckbill}]