Source : Webster's Revised Unabridged Dictionary (1913)

Rockfish \Rock"fish`\, n. (Zo["o]l.)
   (a) Any one of several California scorp[ae]noid food fishes
       of the genus {Sebastichthys}, as the red rockfish ({S.
       ruber}). They are among the most important of California
       market fishes. Called also {rock cod}, and {garrupa}.
   (b) The striped bass. See {Bass}.
   (c) Any one of several species of Florida and Bermuda
       groupers of the genus {Epinephelus}.
   (d) An American fresh-water darter; the log perch.

   Note: The term is locally applied to various other fishes.

Source : WordNet®

rockfish
     n 1: the lean flesh of any of various valuable market fish caught
          among rocks
     2: marine food fish found among rocks along the northern coasts
        of Europe and America
     3: marine food and game fish with dark longitudinal stripes;
        migrates upriver to spawn; sometimes placed in the genus
        Morone [syn: {striped bass}, {striper}, {Roccus saxatilis}]
     [also: {rockfishes} (pl)]