WordReference Random House Unabridged Dictionary of American English © 2017
oar•fish  (ôrfish′, ōr-),USA pronunciation n., pl. (esp. collectively) -fish,  ([esp. referring to two or more kinds or species]) -fish•es. 
  1. Fishany long, ribbon-shaped, silvery fish of the genus Regalecus, of deep tropical waters, having a red dorsal fin along the spine that rises to a crest, and reaching a length of 30 ft. (9 m). Also called  ribbonfish. 
  • oar + fish 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::

oarfish /ˈɔːˌfɪʃ/ n ( pl -fish, -fishes)
  1. a very long ribbonfish, Regalecus glesne, with long slender ventral fins
Etymology: 19th Century: referring to the flattened oarlike body

'oarfish' also found in these entries:

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