The Collaborative International Dictionary of English v.0.48:

squeteague \sque*teague"\ (skw[-e]*t[=e]g"), n. [From the North
   American Indian name.] (Zool.)
   An American sciaenoid fish (Cynoscion regalis), abundant on
   the Atlantic coast of the United States, and much valued as a
   food fish. It is of a bright silvery color, with iridescent
   reflections. Called also weakfish, squitee, chickwit,
   and sea trout. The spotted squeteague (Cynoscion
   nebulosus) of the Southern United States is a similar fish,
   but the back and upper fins are spotted with black. It is
   called also spotted weakfish and squit, and, locally,
   sea trout, and sea salmon. See also under squitee.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Weakfish \Weak"fish`\, n. (Zool.)
   Any fish of the genus Cynoscion; a squeteague; -- so called
   from its tender mouth. See Squeteague.
   [1913 Webster]

   Spotted weakfish (Zool.), the spotted squeteague.
      [1913 Webster]

WordNet (r) 3.0 (2006):

weakfish
    n 1: lean flesh of food and game fishes of the Atlantic coast of
         the United States
    2: food and game fish of North American coastal waters with a
       mouth from which hooks easily tear out [syn: weakfish,
       Cynoscion regalis]