Search Result for "threadfin": 
Wordnet 3.0

NOUN (1)

1. mullet-like tropical marine fishes having pectoral fins with long threadlike rays; 



The Collaborative International Dictionary of English v.0.48:

Threadfin \Thread"fin`\, n. (Zool.)
   Any one of several species of fishes belonging to Polynemus
   and allied genera. They have numerous long pectoral
   filaments.
   [1913 Webster]


WordNet (r) 3.0 (2006):

threadfin
    n 1: mullet-like tropical marine fishes having pectoral fins
         with long threadlike rays