Flatfish belongs to the animal kingdom, Chordata, Kiwifruit, Flat suborder fish. There are about 772 species of 1 1 family in the world, which have a unique asymmetric structure in fish, that is, the eyes only grow on one side of the body. It is generally believed that flounder is a perch-shaped fish, which is resting on one side and basically symmetrical in habit.
Flatfish has a flat body, eyes on one side of the head, and asymmetrical mouth, teeth and lateral fins. The eyeless side usually has no pigment. In fact, newborn flounder, like normal fish, has two eyes on both sides of its head and a mouth in the middle. But as the young fish grow up, one eye gradually moves to the top of the head until the other side, and the mouth is gradually distorted. As an adult, both eyes are on one side of its body.
Living habits of plaice
Flatfish inhabit the sandy bottom of shallow sea, preying on small fish and shrimp. They are especially suitable for benthic organisms on the sea floor. Because their bodies are flat. Both eyes are on the upward side of the body, and the color of this side matches well with the surrounding environment; Their downward side is white. Flatfish has extremely fine scales on its body surface. The flounder has only one dorsal fin, which extends almost from the head to the caudal fin. They mainly live in temperate waters and are important economic fish in temperate waters.
Sole larvae, which have just hatched from the egg membrane, are completely unlike their parents and look very similar to ordinary fish. Eyes are on both sides of the head. One on each side, placed symmetrically. They live in the upper layer of water and often swim near the surface.