2. Perch contains protein, fat, carbohydrate and other nutrients, as well as vitamin B2, nicotinic acid and trace amounts of vitamin B 1, phosphorus, iron and other substances. Perch can tonify liver and kidney, strengthen spleen and stomach, eliminate phlegm and relieve cough, and has a good nourishing effect on people with liver and kidney deficiency. It can also treat fetal movement and postpartum hypogalactia. Expectant mothers and postpartum women eat perch, which can not only supplement the body, but also lead to obesity due to overnutrition. In addition, the blood of perch contains more copper, which is an indispensable mineral to maintain the normal function of human nervous system and participate in the metabolism of various substances.

1. Perch is an animal of rubber genus, with a long body, a flat side, a lower jaw longer than the upper jaw, and a firm garlic clove. It grows and breeds in fresh water, inhabits the clear water bottom, lurks during the day, moves at night, and preys on shrimp and small fish. Body length, flat and flat front, thick, sub-cylindrical, gradually flat and thin; The dorsal and ventral edges are shallow arcs; The dorsal and ventral edges are shallow arcs, the first half of the trunk is slightly higher, and the body at the base of the ventral fin is the highest; The tail handle is low and long. The head is wide and flat, the rear edge is shallow arc, intersecting with the upper jaw at about 25 degrees, and the ventral edge of the head is shallow and inclined. The kiss is wide and round, and the length of the kiss is about twice the diameter of the eye. Two nostrils. The eyes are small and round, and in the upper position, the distance from the posterior edge of branchial lid bone to the snout is slightly less than 2 times. Wide mouth, end position and low inclination of mouth crack. Lip hypertrophy. The maxilla is slightly longer than the mandible, the maxilla is exposed and the posterior end is blunt, reaching below the posterior edge of the pupil. The body is yellowish brown with stripes and spots. There are brown stripes on the nose and mouth, under the eyes, between the eyes and the head. The gill cover is orange. There are 1 strips under the spines of the second to fourth fins of the dorsal fin on the body side, reaching the upper angle of the gill hole, and there are two strips under the fifth to ninth fins and the last fin of the dorsal fin and the base of the caudal fin. There are many stripes on dorsal fin, gluteal fin, pectoral fin and caudal fin. The anal fin is orange. The ventral fin is white and has no markings.

2. When setting the conditions of California bass culture pond, it is necessary to meet the relevant requirements in the policy of Environmental Requirements for Development Sites of Quality and Safety Agricultural Products and Pollution-free Aquatic Products. The breeding ground of California bass must be set in a breeding area with convenient transportation and excellent ecological environment. During this period, the water quality control indicators of aquaculture ponds must meet the relevant requirements in the Fishery Water Quality Standard.