The Collaborative International Dictionary of English v.0.48:

Amia \Am"i*a\, n. [L., fr. Gr. ? a kind of tunny.] (Zool.)
   A genus of fresh-water ganoid fishes, exclusively confined to
   North America; called bowfin in Lake Champlain, dogfish
   in Lake Erie, and mudfish in South Carolina, etc. See
   Bowfin.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bowfin \Bow"fin`\, n. (Zool.)
   A voracious ganoid fish (Amia calva) found in the fresh
   waters of the United States; the mudfish; -- called also
   Johnny Grindle, and dogfish.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bowfin
    n 1: primitive long-bodied carnivorous freshwater fish with a
         very long dorsal fin; found in sluggish waters of North
         America [syn: bowfin, grindle, dogfish, Amia calva]