CATDOLL : CATDOLL: What are some common freshwater fish?

What are the common freshwater fish?

The major freshwater fish species in my country include seven species: black carp, grass carp, silver carp, bighead carp, carp, crucian carp and bighead carp.

(1) Black carp, also known as snail black carp, black carp and black carp, is a bottom fish. It mainly lives in deep water sections of rivers and likes to move in the lower layer of water and areas with fast currents. It likes to eat mollusks such as yellow clams, lake clams and snails. Juvenile fish under 10 cm feed on cladocerans, rotifers and aquatic insects; individuals over 15 cm begin to eat young and thin-shelled clams and snails. It hibernates in deep pools in winter and swims to rapids in spring to lay eggs.

herring

(2) Grass carp, also known as grass carp, mixed fish and grass carp, is a typical herbivorous fish. It has thick meat, few bones and delicious taste. Every 100 grams of grass carp meat contains 17.9 grams of protein, 4.3 grams of fat and a variety of vitamins. Its meat is white and tender, with good toughness and high meat yield. Grass carp generally likes to live in the middle and lower layers of rivers, lakes and other water bodies and near-shore areas with abundant aquatic plants. It has the habit of migrating between rivers and lakes. Sexually mature individuals spawn in rivers and streams. After spawning, the parents and young fish enter tributaries and lakes connected to rivers. They usually feed and fatten in flooded shallow grasslands and flooded areas as well as in the water bodies attached to the main and tributary rivers. In winter, they hibernate in the deep water of the main stream or lake. Grass carp is lively and swims quickly. It often forages in groups and is voracious.

grass carp

(3) Silver carp is also called silver carp or silver carp. The body of silver carp is silvery white, with darker head and back, grayish white paired fins, and black edges on dorsal and caudal fins. It lives in the upper waters of large rivers or lakes. It is lively and good at jumping. It will flee in all directions if it is slightly disturbed. It feeds on plankton throughout its life. The larvae mainly feed on zooplankton such as rotifers, cladocerans and copepods, while the adults filter-feed on phytoplankton such as diatoms and green algae and also feed on zooplankton, etc., which can be used to reduce eutrophication of lakes and reservoirs.

Silver carp

(4) Bighead carp is also called silver carp, black carp, and bighead carp. The back of the bighead carp is gray-black with light yellow hues, the belly is silvery white, and there are many irregular black spots on the sides of the body. The fins are gray-white with many black spots. Bighead carp lives in the middle and upper layers of the water. It is gentle, moves slowly, and is not good at jumping. In natural waters, its number is less than that of silver carp. It usually lives in open water areas in lakes and harbors with flowing water, and hibernates in deep water areas in winter. It feeds on zooplankton throughout its life, and also eats some phytoplankton.

Bighead carp

(5) Carp is also called carp crook or carp. The back of the carp is dark black, the sides are dark yellow, and the abdomen is yellow-white. The lower lobe of the tail fin is orange-red, and the pectoral, pelvic and anal fins are yellow. It is omnivorous. Larvae feed on plankton such as rotifers and cladocerans. Individuals with a body length of more than 15 to 20 mm will switch to feeding on oligochaetes and aquatic insects. Adult fish like to eat mollusks such as snails, clams and cockles.

carp

(6) Crucian carp, also known as crucian carp seeds, crucian carp crooks, crucian carp shells, river crucian carp and crucian carp, is one of the important edible fish in my country. It is similar in shape to carp, with a small head, a relatively high body and no whiskers. It is a bottom-dwelling fish with strong adaptability. Crucian carp is an omnivorous fish that mainly feeds on plant-based food. During the fry stage, it feeds on plankton and benthic animals. Crucian carp generally matures in two winters and is a small to medium-sized fish. It grows slowly, generally weighing less than 250 grams, and the largest can reach about 1250 grams.

Crucian Carp

(7) The Chinese bream is also called Wuchang fish. It is tall and short, very flattened, and has a diamond-shaped body. There is a fleshy ridge on the abdomen from the base of the pectoral fin to the anus. The head is short and triangular. The mouth is small and has no whiskers. It likes to live in the middle and lower layers of open water areas in lakes with submerged plants. It is mild and herbivorous, so it is called "grass bream". Juveniles mainly feed on zooplankton, while adults mainly feed on aquatic plants. Chinese bream grows quickly. Juveniles of 100 to 135 mm can grow to about 0.5 kg after one year of breeding, and can reach a maximum weight of 3.5 to 4.0 kg. Chinese bream is considered to be an excellent breeding target because it grows quickly, has strong disease resistance, high survival rate, large size, and can grow and reproduce in still water.