Pronunciation: (thred'fish"), [key]
—pl. (esp. collectively) -fish, (esp. referring to two or more kinds or species) -fish•es.
any of several jacks of the genus Alectis, esp. A. ciliaris, having the front rays of the dorsal and anal fins greatly elongated.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.