The habits of black fish

Black fish is a common kind of fish in our country, which has strong fecundity, fast growth and strong adaptability, so many people raise it. If you want to raise black fish well, you must first master its habits. What are the habits of black fish?

What are the habits of black fish?

1. Blackfish is a ferocious carnivorous fish. it likes to live in lakes, reservoirs, rivers, ditches and ponds with lush aquatic plants and soft mud bottom. it usually lurks at the bottom of the water, and only moves in the middle and upper layers of the water when feeding or lack of oxygen in the water. Black fish have strong adaptability to bad water quality, water temperature and hypoxia. In addition to the Gill, the respiratory organ of the black fish also has an auxiliary respiratory organ (suprabranchial organ). When there is a lack of oxygen in the water, it can put its head out of the water to breathe the oxygen in the air directly, and is good at jumping. In the case of shock, water injection and bait, often jump 0.5-1.0 meters out of the water.

2. The survival water temperature of black fish is 0-38 ℃, and the optimum water temperature is 16-30 ℃. When the water temperature rises above 8 ℃ in spring, the black fish often moves in the middle and upper layers of the water; when the water temperature drops below 6 ℃ in autumn, it swims slowly and often lurks in the depths of the water; when the water temperature is too low in winter, it hides at the bottom of the water.

3. Black fish is a kind of carnivorous fish, and its food varies with the size of the fish. Juvenile fish less than 3 cm feed on chiropods, cladocera and chironomid larvae, while small fish with a body length of 3-8 cm mainly feed on aquatic insect larvae, fly maggots, small fish, shrimp and small tadpoles. Adult fish of more than 20 cm mainly eat carnivorous animals such as small wild miscellaneous fish, shrimp, frogs and so on. When black fish hunt, they do not chase, but hide near aquatic plants or other hidden objects, keep a close eye on the movement around them, and quickly attack and eat their prey when they see fish, shrimp, frogs, etc., passing by.

4. The growth rate of black fish depends on the quality of the growth environment and the amount of food. Under natural conditions, the body length and weight of 1 winter age fish can reach 19-39 cm and 100-750g, and that of 2 winter age fish can reach 38-45 cm and 600-1400 g. Under the condition of artificial feeding, the weight can reach 250 grams in that year and 0.5-1.0 kilograms in the next year.

Is Blackfish the dirtiest fish in the world?

There are two theories about the dirtiest fish in the world, one is catfish, the other is black fish, but most of them are catfish.

Why the dirtiest fish can not be separated from the influence of its living environment, while black fish can dormant in the sand like Loach.

Benthic fish usually inhabit still water or micro-running water that is overgrown with weeds and soft sediment. Blackfish inhabit all over lakes, rivers, reservoirs, ponds and other waters. Often dive to the bottom of the water to swing its pectoral fins to maintain balance.

It has strong adaptability to the changes of environmental factors in water, especially to hypoxia, water temperature and poor water quality. When the water body is lack of oxygen, it can put its head out of the water. The back is flat on the side. The head is long, slightly flattened at the front and slightly raised at the back. With the help of the suprabranchial organ composed of the upper branchial bone and hyoid bone on the back of the first branchial arch in the branchial cavity, the oxygen in the air is directly breathed. Therefore, even in wet areas with little water and no water, they can survive for quite a long time. The survival water temperature of mullet is 0-41 ℃, and the optimum water temperature is 16-30 ℃. When the water temperature is more than 8 ℃ in spring, it is often active in the middle and upper layers of the water body; in summer, it moves in the upper layer of the water body; when the water temperature drops below 6 ℃ in autumn, it swims slowly and often lurks in the depths of the water; when the water temperature is close to 0 ℃ in winter, it hides in the bottom mud. Has a strong ability to jump. When the weather is stuffy and hot, it rains and the water rises, the black fish tend to jump out of the water and escape along the banks of the pond; when there is an impact of running water, it will also stimulate the fish to jump and escape. If there is not enough bait in the pond, it will also be transferred to other ponds, and its body will move forward slowly in the shape of a snake. When the temperature range is 10 ℃-15 ℃, it can be out of the water for 3-4 days.

In short, black fish has strong viability, fast growth, likes to eat small fish and shrimp, and likes to live in lakes, reservoirs, rivers, ditches and ponds with lush aquatic plants and soft mud bottom. Generally, after growing to 1 year, its body weight can reach 100-750g and its body length can reach 19-30cm.