Fish have ears, but unlike humans, they do not have outer and middle ears, only inner ears. Its ears are hidden on the sides of its head, which can receive sound and balance its body. Most fish have a relatively small range of hearing, can only accept 340-690 vibrations per second of sound waves, a few are more sensitive.
1. Vision: The fish's eye is a small transparent ball. It has no elasticity, so it cannot adjust its curvature. It can only change the distance between the lens and the retina through the mirror-like bulge behind the lens. Therefore, it can only see things that are near, but not things that are far away. However, because its eyes are on the left and right sides, the range of vision is very wide, so every move around can not escape its eyes.
2. Sense of smell: The sense of smell of fish is different from that of land animals. Usually, the sense of smell of land animals is to sense the surrounding volatile gases. However, fish live in water. Its sense of smell is mainly to sense the amino acids in the water body, so as to judge the situation of the surrounding fish. At the same time, it can also detect the quality of water.
3. Taste: The taste of fish mainly depends on its taste buds, which are widely distributed, not only on the mouth, but also on the lips and head. For fish, the role of taste is to determine whether food can be swallowed, so they tend to repeatedly swallow and vomit things they have not eaten.
