Supermarket frozen snapper fillets are tilapia.

Tilapia is native to Africa, is a tropical fish, tilapia genus including subspecies *** there are more than 100 kinds. Tilapia has a generation of fast, high yield, miscellaneous food, less disease, strong reproduction and other characteristics. Tilapia is the main aquaculture aquatic products in China. Its meat is delicious, less spiny, high protein content, rich in 8 essential amino acids needed by the human body, of which glutamic acid and glycine content is particularly high. Tilapia because of the above characteristics and loved by the people, known as "white meat salmon", "21st century fish", has become one of the hot spots of aquaculture, processing, export.

Sea bream is also known as gagi, benga gagi, gagi snapper, copper pot fish. Gagi fish belongs to the class of fish, seabream family. The body is high and laterally flat, more than fifty centimeters long, and the body is silver-red with light blue spots. The caudal fin is greenish-black, the head is large, the mouth is small, the teeth of the upper and lower jaws are conical in front and molar-like at the back, the body is covered with pectinate scales, and the dorsal and anal fins have hard spines. It is found along the coast of China, mainly in the Bohai Sea and the Yellow Sea.