Zhanjiang west of the Beibu Gulf sea, the sea produced by the dried red fish and red fish tube is one of the famous specialties of Zhanjiang. Among them, dried red fish in Zhanjiang is also well-known as Xuwen Dried Red Fish.

The scientific name of the red fish is red-finned snapper, also known as red fish, red groove fish, red chicken, is a warm-water pelagic fish. The fish individual large, small thorns, meat quality is excellent, with high meat content, high protein and low fat and other characteristics, is pollution-free green aquatic products. The northern sea area of the South China Sea and the waters of the Gulf of Tonkin are the most productive areas. The fish body is oval, slightly flattened, generally body length of 20 centimeters ~ 40 centimeters or more, weighing 2 kg ~ 3 kg or so. The head of the red fish is relatively large, the body is clad with large pecten scales, the lateral line is completely parallel to the dorsal edge, the eye spacing is wide and protruding, the whole body is bright red, so it gets the common name of red fish. In addition to braising and steaming, redfin snapper is also suitable for making fish fillets, fish balls, fried fish fillets and so on.

Zhanjiang Beibu Gulf waters produced by the red fish because of the birth of the body fitness and strong, so it can generally live 4 to 5 years, the long-lived up to 7 years or more. And its individual growth is also larger, thick meat, less thorns, meat, high protein content, nutritious, and therefore is classified as a high-quality seafood fish, is a famous seafood delicacies. The annual production of Zhanjiang redfish is relatively stable, and it can be caught all year round, mainly in spring and winter seasons.

There are many kinds of fishing gears for catching redfish, mainly bottom trawling. The "redfish longline" is a traditional method of fishing, where a mother ship carries 25 to 36 daughter ships, and the golden thread fish caught during the day are used as bait for redfin snapper at night.

Xuwen dried red fish has a long history of production, its production of red fish generally in the Gulf of Tonkin using the "red fish longline fishing" method, in the spring flood period, that is, with the hook of fresh red fish immediately in hundreds of kilometers of the deck of the ship repeatedly turning the sun, natural and become. Therefore, Xuwen dried red fish is famous for its natural sunshine.