The Collaborative International Dictionary of English v.0.48:

Elops \E"lops\, n. [L. elops, helops, a kind of sea fish, Gr.
   ?.]
   1. (Zo["o]l.) A genus of fishes. See Saury.
      [1913 Webster]

   2. A mythical serpent. [Obs.] --Milton.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Elops
    n 1: type genus of the Elopidae: tenpounder [syn: Elops,
         genus Elops]