The bottom of perch is gray, slightly gray-green, with many black spots at the back and a slightly shallow abdomen. There is a black spot between the two spines of gill cover and the center of caudal fin base, and there are about ten black-green stripes on the side of the body. No need, there is a broken lateral line parallel to the dorsal edge, the lacrimal bone and gill cover on both sides of the snout have strong serrations, the body surface is covered with hard and thick comb scales, and the dorsal fin and gluteal fin each have sharp and hard thorns.
Life habits of climbing perch
Perch climbing likes to live in slow-flowing rivers and ponds. Young fish mainly feed on micro aquatic animals such as small fish and shrimp, and are omnivorous fish. Under the condition of artificial feeding, artificial compound feed can be eaten after domestication. The suitable growth pH is 6 ~ 9, the water temperature range is 18 ~ 35 degrees, the optimum growth water temperature is 25 ~ 30 degrees, and the feeding is stopped when the water temperature is lower than 15 degrees.
The gill organs of climbing perch are very developed, which can breathe air and stay out of water for a long time without death. On the other hand, the climbing perch has strong pectoral fins, which can move to new waters by swinging the gill cover, pectoral fins and turning over, climbing over the river banks and slopes. Therefore, when the water environment is seriously polluted, other fish can't survive and die one after another, the perch still lives tenaciously.
With the aggravation of water pollution, more and more protozoan fish are extinct, but perch can be spared. It not only adapts to heavily polluted areas, but also becomes the absolute dominant population in polluted areas. Therefore, the survival density of climbing perch can indirectly reflect the pollution degree of water body and can be used as an index species.