Why is the night fish called night fish?

Very timid. Fish like to hide in the dark corner on the eve of the company. They are timid and often get caught at night. They are called night fish. The fish on the eve of our company came from Si Qian Town, Xinhui District, Jiangmen City, Guangdong Province, and it was bighead carp caught from a family pond in Si Qian. Feeding with non-commercial feed, it is strong and fat, generally about a catty.