The Collaborative International Dictionary of English v.0.48:
Ten-pounder \Ten"-pound`er\, n. (Zool.) A large oceanic fish (Elops saurus) found in the tropical parts of all the oceans. It is used chiefly for bait. [1913 Webster]WordNet (r) 3.0 (2006):
Elops saurus n 1: game fish resembling the tarpon but smaller [syn: ladyfish, tenpounder, Elops saurus]