The main ingredient of shark's fin is cartilage, which is beneficial to the repair of human joints, but the cartilage of chicken, duck and pig also has the same effect, and collagen, which has a cosmetic effect, can be obtained from food such as phoenix claw and pig's trotters.

From containing protein, the quality of protein in shark's fin is no better than that of eggs and meat, which contains incomplete protein, while from unsaturated fat, shark's fin, like ordinary sea fish, does not have any special value.

Expanded:

Shark fins are dried shark fins. Those made from the dorsal fin are called spine fins, dorsal fins, or split fins, which have a lot of meat; those made from the pectoral fins are called wing fins or upper green fins, which have a lot of meat; those made from the caudal fin are called tail fins, hooked tips, or tail hooks; and those made from the anal fins are called ruffled fins and fin roots. The caudal and anal fins have the most meat and the fins have the least.

Freshwater fins are sun-dried or impregnated with lime water; saltwater fins are impregnated with salt water. Shark fins can also be categorized according to whether the form is complete or not. The fins that become whole after rising are called row fins, which are the best quality; the fins that spread out into a strip after rising are called scattered fins.

1, the main places of origin:

The shark's fin is mainly produced in China's coastal provinces of Guangdong, Fujian, Taiwan, Zhejiang, Shandong and the South China Sea islands. Japan, the United States, Indonesia, Vietnam, Thailand and other places are produced.

The shark fin needles in Central and South America are soft, smooth and thick.

2, fishing process:

Ancient China has a long history of shark fishing, and sharks are often written as sandfish in ancient books. After the shark is caught, it is usually processed as follows:

(1) Cut off the shark's dorsal fin.

(2) Strip off the shark skin (because the shark skin is very flexible, is a good leather. In ancient times, the sheaths of many valuable swords were made of wood and covered with shark skin).

The fishing of sharks is so cruel that fishermen usually only cut off the fins. Then, the sharks that are still alive are thrown into the sea and left to fend for themselves in extreme pain.

Baidu Encyclopedia - Shark fins

People's Daily Online - Shark fins brutal process exposed China is the main consumer of shark fins