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Croakers

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Croakers
Photo by Bill Levine · CC BY

About

Croakers, also called drums, are bottom-dwelling fish known for making a drumming sound. In this app the group includes the Atlantic Croaker, the Spotted Seatrout, and the Red Drum.

How to tell it apart

Croakers are best told from similar bottom fish by their low-set mouth and the notch in the long back fin. Members differ mainly in colour pattern and body shape, and some, like the red drum, show one or more dark spots near the tail.

Appearance

Croakers have a long fin on the back that reaches almost to the tail, with a notch splitting it into a spiny front part and a soft rear part. Most are plain brown, with a lateral line running all the way to the tip of the tail fin. The mouth sits low on the head.

Habitat

Croakers live worldwide in both fresh and salt water, mostly in estuaries, bays, and muddy river banks in warm and tropical areas. Most avoid clear water such as coral reefs, though a few species do live on reefs.

Behaviour

Croakers make a repeated drumming or croaking sound by vibrating muscles against their swim bladder. Some use this sound to warn off other croakers while feeding or to keep track of each other in cloudy water, while in other species mainly the males croak to attract a mate.

Diet

Croakers are carnivores that feed near the bottom, eating invertebrates and smaller fish.

Did you know?

Croakers make their croaking sound by drumming special muscles against their own swim bladder, like beating a small internal drum.

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