Perch has a long body, a flat side, a big mouth and a slightly inclined jaw. The mandible is slightly longer than the maxilla, with fine serrations at the rear edge of the frontoperculum and three large spines at the lower edge of the rear corner. There is a thorn at the back end of gill cover. The body is covered with a small comb (zhi) and has two dorsal fins. The first dorsal fin has 12 hard spines, and the second dorsal fin consists of 13 soft spines. The ventral fin is in the chest position. The caudal fin is forked, generally weighing 1.5-2.5 kg, and the largest individual can reach 15 kg or more.

Perch is an omnivorous fish, which likes to feed on small stickleback, small squid, small yellow croaker, shrimp, cuttlefish, swordfish, nereis, earthworms, rock worms, sea cockroaches, grasshoppers and silkworms. Perch is silver-gray and lives near the sea. Perch is fierce by nature and likes to pounce on small fish, shrimps and drowning insects. The largest perch can reach 20-30 kg, with tender and full meat, few stings and no fishy smell. This is a precious edible fish.

Perch is a kind of pelagic fish, which moves quickly and likes to prey on all kinds of small marine fish and shrimp. It is suitable for fishing in offshore bay waters, and May ~ 10 is a good season for sea bass fishing every year. In spring, when the weather gets warmer, the perch leaves the deep water and goes to the estuary to feed. After the long summer, perch likes to lay eggs, feed and fatten in the waters near the estuary. Autumn is the golden season for bass fishing.