I want to compare the difference between herring and grass carp.

1、? Both herring and grass carp belong to freshwater fish, but their habits are different. Grass carp swims fast and has a lively temperament. It lives in the middle and lower reaches and feeds on aquatic plants and other plants. On the other hand, herring is large and relatively quiet. It lives underwater and feeds on shrimp, snails and mussels. Therefore, different living habits also determine the differences in size and color between the two kinds of fish.

2、? In terms of size. The herring is slightly longer than the grass carp, and its fins are slightly larger than the grass carp. Its upright state is better than that of the grass carp, and it has more sense of existence. Grass carp looks rounder than herring. For example, herring is like an athlete and grass carp is like an ordinary passerby.

3. From the color point of view. The blue of herring means black, so the color of herring should be mainly black. It starts from the back of the fish, from top to bottom, from deep to shallow, and extends to the white belly of the fish. Grass carp is much lighter in color than herring. Like the earth green, it runs through the whole body.

4、? Judging from the scales. The scales of herring are arranged irregularly, which means that they are a little careless and irregular, and the scales are also large. The scales of grass carp are arranged very neatly, with a strong sense of integrity and small scales. It's rounder than a herring's scales.

5. From the perspective of eating habits. Black herring mainly eats meat, so its head is sharp and its mouth is straight. Grass carp feeds on plants, so its head is round and its mouth is round and curved.

Extended data:

Black herring is a blue fish, which is mainly distributed in the plain area south of the Yangtze River in China, but rarely seen in the north of the Yangtze River. It is an important fishery resource in the middle and lower reaches of the Yangtze River and lakes along the Yangtze River, and is the main breeding object of lakes and ponds. It is one of the "four big fish" in freshwater culture in China.

Black herring is also called black pomfret and snail green. Bony fish, CYPRINIDAE. The body is sub-cylindrical, and the length exceeds1m. Blue-black, fin gray-black. The head is wide and flat, and the mouth end position is unnecessary. Pharyngeal teeth are molars. Habitat in the middle and lower levels, the staple food snails, mussels, shrimp and aquatic insects. 4-5 years old, sexually mature, spawning in the upper reaches of rivers, and can be artificially propagated. The individual is large and grows rapidly, and the largest individual reaches 70kg. This meat tastes delicious. It is the main freshwater fish culture object in China. It is distributed in major water systems in China, mainly in the plain south of the Yangtze River. Fish gall is poisonous.

Grass carp is CYPRINIDAE, CYPRINIDAE, CYPRINIDAE? ? ? ? A genus of the family. The common names of grass carp are: pomfret, pomfret, pomfret, grass pomfret, pomfret, grass carp, grass root (northeast), coarse fingered fish (southern Shandong), sea pomfret (south), hybrid, black herring and so on. English name: Grass carp. Rivers and lakes inhabiting plain areas generally prefer to live in the middle and lower layers of water and coastal areas with more aquatic plants. Sexually active, swimming fast, often foraging in groups. It is a typical herbivorous fish. Grass carp eat larvae, algae, etc. In the juvenile stage, grass carp also eat some carnivorous foods, such as earthworms and dragonflies. Overwintering in the deep water of mainstream or lake. Parent fish have the habit of swimming against the current during the breeding season. It has been transplanted to many countries in Asia, Europe, America and Africa. Because of its rapid growth and wide sources of feed, it is one of the four largest freshwater fish in China.

Grass carp, Cyprinidae. The body is slender, sub-cylindrical, and the body length is more than1m. The body is bluish yellow. The head is wide and flat, and the mouth end position is unnecessary. Pharyngeal tooth comb. It lives in the middle and lower layers of water and feeds on aquatic plants. Mature at 3-4 years old, spawning in the upper reaches of rivers, which can be artificially propagated. It grows fast, and the largest individual is about 30kg. It is the main freshwater fish culture object in China. Distributed in major water systems in China, the meat is delicious and the fish gall is toxic.

References:

Herring _ Baidu Encyclopedia? Grass carp-Baidu encyclopedia