The Collaborative International Dictionary
Elops saurus
Ten-pounder \Ten"-pound`er\, n. (Zo["o]l.) A large oceanic fish ( Elops saurus) found in the tropical parts of all the oceans. It is used chiefly for bait.
Wikipedia
Elops saurus
Elops saurus, the ladyfish or tenpounder, is a species of fish in the genus Elops, the only genus in the monotypic family Elopidae.