1,? Cyprinids and grass carp both belong to freshwater fish, but have different habits. Grass carp swim quickly, lively temperament, living in the waters of the middle and lower, to water plants and other plants for food. The mackerel is large and relatively quiet, living in the bottom of the water, feeding on shrimp, snails, mussels and so on. So the different habits of life also determines the two kinds of fish in body size, color and other aspects of the difference.

2.? From the point of view of body size. Mackerel body type is slightly longer than the grass carp, fins are slightly larger than the grass carp, and the upright situation is better than the grass carp, more presence. Grass carp body type compared to the bluegill appears to be a little more rounded. It is as if the mackerel is like a sportsman and the grass carp is like an ordinary passerby.

3, from the color. Mackerel green for the meaning of black, so look at the color of the mackerel should be ink black. Since the back of the fish from top to bottom extension, ink black from deep shallow, until the fish belly white. The color of grass carp is much lighter than that of mackerel. Like an earthy green color that runs throughout the body.

4,? From the fish scales. Mackerel fish scales are not neatly arranged, a bit of a big grin, not quite in order, and the fish scales of the block is also significantly larger. And the fish scales of the grass carp are arranged very neatly, the overall sense is very strong, the fish scales of the block is also significantly smaller. And than the mackerel fish scales appear rounded.

5, from the diet. Mackerel to meat-based, so the head is pointed, the mouth is straight. Grass carp to plant-feeding, so the head is rounded, the mouth is more rounded, there are curved lines.

Expanded:

< p>The mackerel is a color green fish, mainly distributed in the plains south of the Yangtze River in China, north of the Yangtze River is more rare; it is the Yangtze River, the lower reaches of the Yangtze River and lakes along the river in the important fishery resources and lakes, ponds in the main object of culture for China's freshwater aquaculture "four big fish" one.

Green carp is also known as black carp, snail green. Scleractinia, carp family. Body sub-cylindrical, body length of more than 1m. Greenish black, fins gray-black. The head is broad and flat, the mouth end position, beardless. Pharyngeal cephalic teeth molar-like. It inhabits the lower and middle layers of the river and feeds on snails, mussels, shrimps and aquatic insects. 4-5 years old, it is sexually mature and spawns in the upper reaches of the river, and can be artificially reproduced. It is a large, fast-growing fish, with the largest individual reaching 70kg, and its meat is very tasty. It is the main freshwater fish culture object in China. Distributed in China's major water systems, mainly produced in the plains south of the Yangtze River. Fish gall is poisonous

Grass carp belongs to the carp family carp subfamily Yaluo fish genus grass carp. Common names of grass carp are: grass carp, grass carp, oil grass carp, grass carp, white grass carp, grass carp, grass root (Northeast), thick fish (Lunan), sea grass carp (South), mixer, black mackerel, and so on. English name: Grass carp . It inhabits rivers and lakes in the plains, and generally prefers to live in the middle and lower layers of the water and the near-shore areas with lots of water plants. It is active, swims quickly and often forages in groups. It is a typical herbivorous fish. Grass carp larvae eat larvae, algae, etc. Grass carp also eat some meat, such as earthworms, dragonflies and so on. It overwinters in deep water in dry streams or lakes. Parent fish have anadromous habits during the reproductive season. It has been transplanted to many countries in Asia, Europe, America and Africa. Because of its rapid growth and wide source of feed, it is one of the four major fish in freshwater aquaculture in China.

Grass carp, family Carpidae. The body is prolonged, sub-cylindrical, with a body length of more than 1m. Body greenish yellow. Head broad and flat, mouth end position, beardless. Pharyngeal teeth comb-like. Inhabiting the middle and lower layers of the water, feeding on water plants. 3-4 years old mature, spawning in the upper reaches of the river, can be artificially reproduced. It grows fast, and the largest individual reaches about 30kg. It is the main freshwater fish culture object in China. Distributed in China's major waterways, the meat is flavorful and the bile is poisonous

References:

Marlins _ Baidu Encyclopedia? Grass carp - Baidu Encyclopedia