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:

Needlefish \Nee"dle*fish`\, n. (Zool.)
      (a) The European great pipefish (Siphostoma acus or
          Syngnathus acus); -- called also earl, and
          tanglefish.
      (b) The garfish.
          [1913 Webster]

WordNet (r) 3.0 (2006):

needlefish
    n 1: elongate European surface-dwelling predacious fishes with
         long toothed jaws; abundant in coastal waters [syn:
         needlefish, gar, billfish]
    2: fish with long tubular snout and slim body covered with bony
       plates [syn: pipefish, needlefish]