The Collaborative International Dictionary of English v.0.48:

Garfish \Gar"fish`\, n. [See Gar, n.] (Zool.)
   (a) A European marine fish (Belone vulgaris); -- called
       also gar, gerrick, greenback, greenbone,
       gorebill, hornfish, longnose, mackerel guide,
       sea needle, and sea pike.
   (b) One of several species of similar fishes of the genus
       Tylosurus, of which one species (T. marinus) is
       common on the Atlantic coast. T. Caribb[ae]us, a very
       large species, and T. crassus, are more southern; --
       called also needlefish. Many of the common names of the
       European garfish are also applied to the American
       species.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sea pike \Sea" pike`\ (Zool.)
   (a) The garfish.
   (b) A large serranoid food fish (Centropomus undecimalis)
       found on both coasts of America; -- called also robalo.
   (c) The merluce.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pike \Pike\, n. [F. pique; perhaps of Celtic origin; cf. W. pig
   a prick, a point, beak, Arm. pik pick. But cf. also L. picus
   woodpecker (see Pie magpie), and E. spike. Cf. Pick, n. &
   v., Peak, Pique.]
   1. (Mil.) A foot soldier's weapon, consisting of a long
      wooden shaft or staff, with a pointed steel head. It is
      now superseded by the bayonet.
      [1913 Webster]

   2. A pointed head or spike; esp., one in the center of a
      shield or target. --Beau. & Fl.
      [1913 Webster]

   3. A hayfork. [Obs. or Prov. Eng.] --Tusser.
      [1913 Webster]

   4. A pick. [Prov. Eng.] --Wright. Raymond.
      [1913 Webster]

   5. A pointed or peaked hill. [R.]
      [1913 Webster]

   6. A large haycock. [Prov. Eng.] --Halliwell.
      [1913 Webster]

   7. A turnpike; a toll bar. --Dickens.
      [1913 Webster]

   8. (Zool.) sing. & pl. A large fresh-water fish (Esox
      lucius), found in Europe and America, highly valued as a
      food fish; -- called also pickerel, gedd, luce, and
      jack.
      [1913 Webster]

   Note: Blue pike, grass pike, green pike, wall-eyed pike, and
         yellow pike, are names, not of true pike, but of the
         wall-eye. See Wall-eye.
         [1913 Webster]

   Gar pike. See under Gar.

   Pike perch (Zool.), any fresh-water fish of the genus
      Stizostedion (formerly Lucioperca). See Wall-eye,
      and Sauger.

   Pike pole, a long pole with a pike in one end, used in
      directing floating logs.

   Pike whale (Zool.), a finback whale of the North Atlantic
      (Bal[ae]noptera rostrata), having an elongated snout; --
      called also piked whale.

   Sand pike (Zool.), the lizard fish.

   Sea pike (Zool.), the garfish
      (a) .
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Merluce \Mer"luce\, n. [F. merluche, merlus.] (Zool.)
   The European hake; -- called also herring hake and sea
   pike.
   [1913 Webster]