Definition of longfin in English:

longfin

noun

  • Any of various fishes distinguished by a long fin or fins; specifically (a) chiefly US the albacore or long-finned tuna, Thunnus alalunga; (b) Australian and NZ a reddish, long-finned serranid fish of the genus Caprodon, especially the pink maomao, C. longimanus. (c) NZ the long-finned eel, Anguilla dieffenbachii, of New Zealand.

adjective

  • Designating fishes and other aquatic animals distinguished by a long fin or fins.

Origin

Mid 19th century; earliest use found in Encyclopaedia Metropolitana. From long + fin.

Pronunciation

longfin

/ˈlɒŋfɪn/