Does fisheye have night vision? Can fish see things in the water in the dark?

Fish can't see in the dark, and they perceive the environment and the movement of creatures in the water by the lateral lines on both sides of the fish.

Fisheye eyes are generally located on both sides of the head, and most of them can't be closed without eyelids. The lens of the eye is spherical. What does visual adjustment depend on? The position of the lens moves back and forth instead of changing the convexity of the lens. Therefore, fisheye is extremely nearsighted.

The lens of fish is inelastic. It is not as thick or thin as human lens. So fish can only watch objects at different distances by adjusting the distance between lens and retina.

Extended data:

China is one of the countries with more fresh water surface in the world, with a fresh water area of about 300 million mu, of which 75 million mu can be used for fish farming.

Most of China is located in temperate or subtropical zone, with mild climate and abundant rainfall, which is suitable for fish growth. It has excellent fish culture techniques such as grass carp, silver carp, bighead carp, herring, bream, carp, crucian carp and bream. It is the most developed country in the world today, and it ranks in the leading position in the world in terms of aquaculture area and total output.

Due to the vast territory of China, the geographical and natural environment, fish species and pattern characteristics of different regions are different. According to the regional classification of climate, fish are widely distributed.