(1):

(n.) The surf fish of California.

(2):

(n.) One who croaks, murmurs, grumbles, or complains unreasonably; one who habitually forebodes evil.

(3):

(n.) A small American fish (Micropogon undulatus), of the Atlantic coast.

(4):

(n.) An American fresh-water fish (Aplodinotus grunniens); - called also drum.