The Collaborative International Dictionary of English v.0.48:

Grunt \Grunt\ (gr[u^]nt), n.
   1. A deep, guttural sound, as of a hog.
      [1913 Webster]

   2. (Zool.) Any one of several species of American food
      fishes, of the genus Haemulon, allied to the snappers,
      as, the black grunt (Haemulon Plumieri), and the
      redmouth grunt (Haemulon aurolineatus), of the Southern
      United States; -- also applied to allied species of the
      genera Pomadasys, Orthopristis, and Pristopoma.
      Called also pigfish, squirrel fish, and grunter; --
      so called from the noise it makes when taken.
      [1913 Webster]

   3. A U. S. infantryman; -- used especially of those fighting
      in the war in Vietnam. [slang]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Sailor \Sail"or\, n.
   One who follows the business of navigating ships or other
   vessels; one who understands the practical management of
   ships; one of the crew of a vessel; a mariner; a common
   seaman.
   [1913 Webster]

   Syn: Mariner; seaman; seafarer.
        [1913 Webster]

   Sailor's choice. (Zool.)
   (a) An excellent marine food fish (Diplodus rhomboides,
       syn. Lagodon rhomboides) of the Southern United States;
       -- called also porgy, squirrel fish, yellowtail,
       and salt-water bream.
   (b) A species of grunt (Orthopristis chrysopterus syn.
       Pomadasys chrysopterus), an excellent food fish common
       on the southern coasts of the United States; -- called
       also hogfish, and pigfish.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pigfish \Pig"fish`\, n. (Zool.)
   (a) Any one of several species of salt-water grunts; --
       called also hogfish.
   (b) A sculpin. The name is also applied locally to several
       other fishes.
       [1913 Webster]

WordNet (r) 3.0 (2006):

pigfish
    n 1: found around the Great Barrier Reef [syn: pigfish, giant
         pigfish, Achoerodus gouldii]
    2: found from Long Island southward [syn: pigfish, hogfish,
       Orthopristis chrysopterus]