Grass carp (Ctenopharyngodon idellus) is a large freshwater fish, belonging to CYPRINIDAE, which is distributed in all major river systems except the northwest plateau in China. The largest adult fish can reach more than 50 kilograms, and the largest cultured fish can reach 30 kilograms. It is listed as the first of the four major fish: grass carp, silver carp and bighead carp. Mature at 4-5 years old, usually 3-20 kg. It is a fishing hobby of large freshwater fish. A large number of herbivores are the basic differences between grass carp and other freshwater fish in fishing methods. Grass carp likes animal food first, then plant food. For example, in the process of fishing, we use crickets, grasshoppers, bee pupae, giant caterpillars, silkworm pupae and moths as bait, and the effect is far better than that of using grass, vegetable leaves and grains as bait. Only in seasons and fishing grounds without these animal baits. Grass carp can also be caught with plant bait. The reason is that grass carp eats a lot, and high-grade food can't meet its needs at all, so it has to rely on a lot of coarse grains to satisfy its hunger, especially the wild grass carp in reservoirs and lakes. In order to fill its stomach, even the grass roots and hard stalks are eaten, so people have given it the reputation of pioneers.

Grass carp is generally in the middle water, sometimes in the middle or lower water, depending on the season, weather, water depth and other factors. Especially when eating, it will even reach the surface or bottom of the water. Besides season, weather, temperature, water depth and human factors, food has the greatest influence on grass carp swimming layer. Because grass carp eat a lot, they are always hungry except when it is dark and bright. Where there is food, we will go. In the evening and at night, we will go to the water meter on the shore and stick our heads out to pull out the grass leaves that reach the water. This is one of the bases for us to judge whether there is grass carp in the water. Grass carp also has the habit of being quiet and frightened, because it often moves in the middle or upper layer of water, so people, poles and noise are more likely to make it escape. This is what we should pay great attention to when fishing grass carp.