Tiger grouper is a deep-sea fish. The body length is oval, and the side is flat and thick. The mouth is large, with a well-developed auxiliary maxilla. There are a few big canine teeth at the front end of the maxilla and mandible, and the teeth on both sides are thin and pointed, which can lie inward. The posterior edge of the anterior branchial operculum is generally serrated and smooth, and there are two thick spines on the posterior edge of the branchial operculum, and the branchial harrow is medium-long and few in number. The body is covered with a small comb, and the spines of dorsal fins are connected with the fins, and there are no engravings. Generally, there are 11 fin spines (rarely 1), 14-18 fins, 3 fin spines and 8-9 fins in the gluteal fins, and the first fin spine is the strongest. The caudal fin is round, truncated or concave. There are 1-2 pyloric caecum.