Nereis, squid slices and various small fish are used.
fish are warm animals, and their body temperature will change with the change of water temperature. Therefore, their growth and reproduction need a suitable water temperature environment. According to the different water temperatures suitable for the normal growth and reproduction of fish, they can be divided into three types: warm water, warm water and cold water.
Generally, warm-water fish have the strongest appetite and the fastest growth and reproduction speed when the water temperature is 3℃-5℃. When the water temperature drops below 2℃, it will lead to loss of appetite and slow action; If the water temperature drops below 15℃, it will die.
Warm-water fish are most suitable for living at the water temperature of 15℃-3℃; When the water temperature is above 3℃, avoid the cool water (usually deep water); Water temperature above 4℃ will cause large-scale death of warm-water fish; When the water temperature is below 1℃, the fish will lose its appetite and stop growing. When the water temperature drops below 4℃, most of them will stop eating and hibernate. Therefore, the best water temperature for catching warm-water fish should be between 15℃ and 3℃.
Cold-water fish will swim to the cold water area above 2℃; The water temperature of 4℃-15℃ is the most suitable temperature for them, and cold-water fish are also the most suitable to catch at this time.