The tongue of a fish is formed from a fold in the floor of the mouth. In some species of bony fishes the tongue has teeth which help to hold prey items. The name of one genus of argentinid fish, Glossanodon, literally means 'tongue teeth'. ... Most fishes however cannot protrude their tongues.

Which animal has no tongue?

Other animals naturally have no tongues, such as sea stars, sea urchins and other echinoderms, as well as crustaceans, says Chris Mah via email.

What do fishes tongues look like?

Most fish have a bony structure called the basihyal on the floor of the mouth that superficially resembles a tongue. But it doesn't have taste buds, isn't muscular and has very little range of motion, so it isn't directly equivalent.