Croaker
Croaker (-?r) , noun
1.
One who croaks, murmurs, grumbles, or complains unreasonably; one who habitually forebodes evil.
2.
(a) (Zoology) A small American fish (Micropogon undulatus), of the Atlantic coast.
(a)
(Zoology) An American fresh-water fish (Aplodinotus grunniens); -- called also drum.
(c)
(Zoology) The surf fish of California.
When caught these fishes make a croaking sound; whence the name, which is often corrupted into crocus.