Source : Webster's Revised Unabridged Dictionary (1913)

Whistlefish \Whis"tle*fish`\, n. (Zo["o]l.)
   A gossat, or rockling; -- called also {whistler},
   {three-bearded rockling}, {sea loach}, and {sorghe}.

Gossat \Gos"sat\, n. (Zo["o]l.)
   A small British marine fish ({Motella tricirrata}); -- called
   also {whistler} and {three-bearded rockling}. [Prov. Eng.]