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Do fish have pain? Do fish also have pain

Fish have pain. Although this animal does not have a cerebral cortex similar to that of mammals, it can also feel pain. After receiving strong mechanical stimulation, the nerve will send signals to the brain to make it avoid. It is worth mentioning that its process of feeling pain is very simple, and it may not be able to effectively distinguish different stimuli, but this does not mean that they can't feel pain. 1、 Is there pain? Fish have pain, but it is different from human perception of pain. This animal has no cerebral cortex, so the process of feeling pain is much simpler. When they are subjected to strong mechanical stimulation, the nerves will transmit signals to the brain for decision-making. 2、 Other senses 1. Vision: there are many kinds of fish. For fish living within 100 meters from the water surface, the retina contains a large number of cone cells, so you can feel the visible light in the water. For fish living at a depth of 100-1000 meters, the retinal structure will change, reducing cone cells and increasing rod cells, so as to feel the shape of objects in dark waters. Fish below 1600 meters have no cone cells, only rod cells, and their visual ability is weaker.

2. Hearing: from the appearance of fish, you can't see ears, but fish don't have ears. There are inner ears on both sides of the head, which is divided into two parts. The upper part is an elliptical bundle and the lower part is a spherical capsule. It can capture the sound in the water and transmit the signal to the brain through chemical reaction. In addition, the inner ear is responsible for balance.

3. Smell: fish live in the water, so the smell is different from that of terrestrial animals. The nose of terrestrial animals can capture volatile smell, while fish rely on amino acids in the water to identify the taste, so as to judge the water quality. At the same time, it can also find the surrounding fish, which can not only prey, but also avoid the invasion of natural enemies. (YuLeiYouTongJiaoMa,YuLeiYeYouTengTongGanMa)