Source : Webster's Revised Unabridged Dictionary (1913)

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

Grindle \Grin"dle\, n. (Zo["o]l.)
   The bowfin; -- called also {Johnny Grindle}. [Local, U. S.]