The Collaborative International Dictionary of English v.0.48:

Dragonet \Drag"on*et\, n.
   1. A little dragon. --Spenser.
      [1913 Webster]

   2. (Zool.) A small British marine fish (Callionymuslyra);
      -- called also yellow sculpin, fox, and gowdie.
      [1913 Webster]

WordNet (r) 3.0 (2006):

dragonet
    n 1: small often brightly colored scaleless marine bottom-
         dwellers; found in tropical and warm temperate waters of
         Europe and America