Epinephelus nigricans is a common marine fish, belonging to Perciformes. Most of them live in the southern coastal areas of China, including Guangdong Province. Black-and-white spotted fish has a large body, an oval body, a dark blue or gray back in most cases, and a white abdomen. One of their characteristics is that they have black spots and white spots on their bodies, hence the name. This kind of fish is very popular in Guangdong, and is widely used for cooking and eating because of its delicious meat. They are often served as high-grade seafood in various restaurants and seafood markets.