croaker means: This dark-skinned fish, a member of the family Drum, is often found along temperate coast waters. Croaker is a small fish that weighs in at about 1 pound. It has mild flesh with mild taste. (in Cooking Dictionary)

What else does croaker mean?

One of many fish species named after the distinctive drumming sound or deep croaking they make. They are firm, and very low in fat. This family also includes black croaker and black drum as well as hardhead, redfish, kingfish, and hardhead. (in Cooking Dictionary)

Croaking animals, particularly frogs. (in Merlin Dictionary)

An individual who grumbles, or predicts bad things in a regular fashion. (in Merlin Dictionary)

One of many freshwater and marine fishes in the Sciaenidae family that makes a loud croaking sound when they vibrate certain muscles attached at the swim bladder. (in Merlin Dictionary)