It is rice fish. The following is an introduction about this fish in Baidu Encyclopedia:

Rice fish, a work? ? Fish (sound mi ? n) is similar to perch, but its meat is slightly rough, its body color is dark, it is grayish brown with purplish green, and its abdomen is gray. The upper edge of the dorsal fin spine is black, and there is a vertical black stripe in the center of the fin. There is a clear spot above the axillary part of the pectoral fin. The remaining fins are grayish black. The shape of rice fish is flat on both sides and extended backward, with shallow arc on the back and abdomen.

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