Found 2 items, similar to threadfin.
English → English (WordNet) Definition: threadfin threadfin n : mullet-like tropical marine fishes having pectoral fins with long threadlike rays
English → English (gcide) Definition: Threadfin Threadfin \Thread"fin`\, n. (Zo["o]l.) Any one of several species of fishes belonging to Polynemus and allied genera. They have numerous long pectoral filaments. [1913 Webster]