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Living habits of Pseudosciaena crocea
Pseudosciaena crocea is a warm-temperate coastal group migratory fish, mainly inhabiting the coastal areas within 80 meters and the middle and lower layers of offshore waters. Usually inhabit deep-sea areas, migrate to the offshore from April to June to lay eggs, and then scatter along the coast to seek bait and feed on fish and shrimp. Egg-laying fish are afraid of strong light and like countercurrent, so they prefer turbid waters with less transparency. It floats at dawn, dusk or high tide, and sinks at daytime or low tide. Adult fish mainly eat all kinds of small fish and crustaceans (shrimp, crab, squids). The feeding intensity decreased significantly in the peak reproductive period; After reproduction, the feeding intensity increases. Juvenile fish mainly eat zooplankton such as copepods, mysids and krill.

Pseudosciaena crocea can make a strong intermittent sound and is also sensitive to sound. Its main vocal organs are the swim bladder and its vocal muscles on both sides. When the vocal muscles contract, pressing the internal organs makes the swim bladder vibrate and produce sound. In the breeding season, fish make "giggles" and "whoops" all day long, which is rare in fish. This kind of sound is generally considered as a means for fish to communicate, and it is used as a signal for fish to gather during reproductive period. Fishermen in China have long used this habit to judge the size, habitat and location of large yellow croaker, so as to facilitate fishing.

Pseudosciaena crocea has a high requirement for dissolved oxygen, which is generally above 4 mg/L. The critical value of dissolved oxygen for young fish is about 3mg/L, and that for young fish is about 2 mg/L. Therefore, special attention should be paid to keeping dissolved oxygen above 5mg/L in artificial seedling cultivation, otherwise it will easily lead to anoxia floating head and death.