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:

Scup \Scup\, n. [Contr. fr. American Indian mishc[`u]p, fr.
   mishe-kuppi large, thick-scaled.] (Zool.)
   A marine sparoid food fish (Stenotomus chrysops, or
   Stenotomus argyrops), common on the Atlantic coast of the
   United States. It appears bright silvery when swimming in the
   daytime, but shows broad blackish transverse bands at night
   and when dead. Called also porgee, paugy, porgy,
   scuppaug.
   [1913 Webster]

   Note: The same names are also applied to a closely allied
         Southern species (Stenotomus Gardeni).
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spadefish \Spade"fish`\ (sp[=a]d"f[i^]sh`), n. (Zool.)
   An American market fish (Chaetodipterus faber) common on
   the southern coasts; -- called also angel fish, moonfish,
   and porgy.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Porgy \Por"gy\, n.; pl. Porgies. [See Paugie.]
   1. (Zool.)
      (a) The scup.
      (b) The sailor's choice, or pinfish.
      (c) The margate fish.
      (d) The spadefish.
      (e) Any one of several species of embiotocoids, or surf
          fishes, of the Pacific coast. The name is also given
          locally to several other fishes, as the bur fish.
          [Written also porgee, porgie, and paugy.]
          [1913 Webster]

   2. (Zool.) Any one of numerous sparoid food fishes, as the
      jolthead porgy, the sheepshead porgy (Calamus penna) of
      the West Indies, the grass porgy (Calamus arctifrons) of
      Florida, and the red porgy (Pagrus pagrus) of Europe.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

porgy
    n 1: lean flesh of fish found in warm waters of southern
         Atlantic coast of the United States [syn: porgy, scup]
    2: important deep-bodied food and sport fish of warm and
       tropical coastal waters; found worldwide