Yellow croaker is divided into large yellow croaker (Pseudosciaena crocea) and small yellow croaker (Psendosciaena polyactis), which are one of the four major marine industry species in China. Large yellow croaker is also called big first, golden dragon, cucumber fish, red melon, golden dragon, osmanthus yellow croaker, king fish, big yellow croaker; small yellow croaker is also called plum, plum, small king fish, small first, small spring fish, small cucumber fish, thick scale Aberdeen, flower fish. They all belong to the class of fishes, Tochiocephalidae. Its shape is similar, and its habits are similar. This type of fish has a flat and elongated body and is golden yellow.