From your picture, this is a species of fish in the family Pomfretidae. It is a collective name for long-bodied demersal fishes that are found in the warm and temperate oceans of the world.

D鲂鮄鲂鮋硬骨鱼階序鮋形目鮄鲂鮄戸鲂鮄戸鲂鮄. Also known as the red lady and the green fin. Marine economic fish. The body is cylindrical, thick in front and narrowing backward. The head is slightly oblong, dorsally and laterally covered with bony plates. Antennal side with angular protrusion. Dorsal fins 2 and separated. Pectoral fins with 3 finger-like free fins below for bottom crawling.

The pomfrets are small and medium-sized tropical, subtropical and temperate offshore demersal fishes, which are widely distributed in the Atlantic, Pacific and Indian Oceans, and there are more than 70 species in 9 groups. There are more than 70 species in 9 groups. The economic species include pomfrets, pomfrets, greenfins, rednecks and so on. Those with greater economic value include the greenfin and the short-fin red mullet.