Abstract: Aquatic products are popular among consumers due to their rich nutrients and delicious taste. Their muscle quality always attracts attention, which can be judged from the microstructure of muscle tissues. Microstructure is often used as a key indicator for evaluating the muscle quality of aquatic products. The evolution of the microstructure of aquatic products during storage, processing and circulation is reviewed in this article. The technical characteristics and applicability scope of various methods for detecting the microstructure of muscle tissues of aquatic products are summarized, and the relationship between the microstructure of muscle tissues and the physicochemical indexes related to muscle quality is described. The purpose of this review is to provide a theoretical reference for further improving the quality evaluation and regulation system of aquatic products in the future.

Key words: aquatic products; muscle tissue; microstructure; microscopic observation; nondestructive testing