Fish have teeth. The teeth of these animals are divided into two kinds, one is oral teeth, the other is throat teeth. Not all fish have mouth teeth, but basically they all have throat teeth. Throat teeth are used to cut up food so that it can be swallowed better. Throat teeth have a variety of shapes, some are flat and thin, some are finger-shaped, some have sharp tips, and some have hooks.
1. Filter-feeding: There are many filter-feeding fish, such as silver carp, bighead carp, and grass carp. This fish has long, thin, dense gill rakers, which help it to filter its food. It is usually fed with cladocerans, copepods, rotifers, and some algae. Their teeth are thin and fluffy, arranged in a band of teeth.
2. Herbivorous: Herbivorous fish feed on aquatic plants, as well as algae and submerged land plants. Common species include grass carp, bream, and blunt snout bream.
3. Carnivorous: Carnivorous fish are generally quite ferocious, such as catfish, snakehead, and mackerel. They mostly feed on fish, crustaceans, and mollusks. Their teeth are relatively large, mostly conical, and some are incisor-shaped, canine-shaped, or molar-shaped.
4. Omnivorous: Omnivorous fish can eat plants as well as small fish and shrimps. They have a wide range of feeding habits. Most of their teeth are cut, brushed, ground, and notched.
