Wordnet 3.0
NOUN (1)
1. 
 any of numerous small food fishes; 
 especially those caught with hook and line and not available on the market; 
The Collaborative International Dictionary of English v.0.48:
panfish \panfish\ n.
   1. Any of numerous small food fishes; especially those not
      available on the market.
      [WordNet 1.5]
   2. Any of numerous small food fishes taken with hook and
      line.
      [WordNet 1.5]
WordNet (r) 3.0 (2006):
panfish
    n 1: any of numerous small food fishes; especially those caught
         with hook and line and not available on the market