In winter, the fish condition is getting worse and worse, and the reason is because the temperature becomes colder. There is a folk fishing proverb that says: the fish in the beginning of winter are fat and strong, and they can't be carried when they are fished well, which shows that the fish in the early winter stage is good. The snow fish detect the cold, and the sun settles the house, and the range of fish activities begins to decrease after the temperature drops. The small cold fish is sluggish, and the deep habitat is warm, and when the temperature is at its lowest throughout the year, the fish is a little sleepy. Therefore, there is this phenomenon of forming groups of three or five in the early winter stage and large groups in the cold winter stage, so the lower the temperature, the more you must find the fish nest first. 
Fish have the characteristics of temperature, oxygen and food, and we often choose the right fishing position according to these three characteristics. However, when the temperature is low in winter, there will be no lack of oxygen in the water, because although the level of dissolved oxygen is related to the level of air pressure, it is also related to the level of water temperature. Moreover, the activity of fish in the low temperature season is insufficient, and the demand for dissolved oxygen is much lower than that in other seasons, so the dissolved oxygen factor is completely unconsidered. The food factor is also very important, because crucian carp do not hibernate in winter, so there will be a large consumption, so they need to eat occasionally, and the larger the body, the more they need to eat. Temperature is naturally more important, which directly affects where there may be fish, and in winter the fish will gradually become hot, and there may be fish when the water temperature is high. 
Therefore, if you want to catch a large crucian carp, the two major factors that need to be considered in winter fishing are water temperature and food factors. The level of water temperature is related to many factors, but the most important thing is the level of air temperature, but the level of air temperature is an objective condition, we are looking for the same temperature conditions, the water temperature is higher area, which involves many factors such as water depth, orientation, wind direction, water flow, obstacles, etc. Still water is warmer than living water, unless the ** of living water is a hot spring, or a cold winter when it is warm in winter and cool in summer. The sunny position is warmer than the less sunny area, and the sheltered position is warmer than the upwind, downwind, and crosswind position. The area with obstacles is warmer than the water, but the relationship between the depth of the water and the temperature of the water is more fantastic. The temperature is not low, the shallow water is warm, and the temperature is very low, and the deep water is warm. 
Therefore, from the perspective of topography, if there are obstacles such as dark grass and reeds, as long as the depth is appropriate, there will be fish nests, which is the inevitable result of fish temperature. Wherever there are these obstacles, it is not only warm and suitable for crucian carp to hide, but also has a lot of aquatic insects and small shrimp to spend the winter here, and it is also a place where food is abundant. In winter, people wear cotton jackets, fish drill grass pennies, the first choice is the place where there is dark grass underwater, the dead branches and rotten leaves are fish mattresses, warm and deep, food is also relatively sufficient, it is an ideal hiding place for large crucian carp. The second is the sunny side of the reeds, the deep water and complex underwater environment, warm and abundant food, which is also an excellent terrain for large crucian carp. If there are no obvious obstacle areas, then look for bridge piers, tree stumps and other locations, which also belong to the classic terrain for crucian carp to spend the winter. 
If there is nothing, then you can only fish for open water. It is important to pay attention to the fact that it is more reliable to choose a small water surface for winter fishing, not only the density of crucian carp is large, but also the difficulty of finding a fish nest is relatively low. Just imagine, the temperature is already very low, and the fish will hide in the warm deep water, but because the water surface is not large or even relatively narrow, the long rod reaches directly to the middle of the river, and the fish nest is naturally easier to find than the large water surface. Rivers that do not have obstacles such as aquatic weeds are generally sheltered from the wind and looking for dead corners, and you can still fish without grass. There is also a fish nest at the bottom of the uneven water, the location of the uneven bottom of the winter fishing should be the deep water in the shallow water, to find the underwater trench, the deep water is not only warm, hiding in the pit can also reduce the scouring of the flowing water. Finally, it is to find a sunny bay and a place where the river bends, the water flow is gentle, and the food is more abundant. 
Generally speaking, large crucian carp do not stop eating in winter, so if you want to fish for large crucian carp, it is best to have a good water temperature and a certain amount of food**, and the obstacle area is usually much better than the open water area. Please pay attention to the collection and like, update on time every day, thank you fishing friends!