Knife fish are not farmed, they are deep-sea wild fish.

Swordfish is a deep-sea fish species. If it is not cultured in the deep sea and cannot reach the "negative pressure" environment in which it lives, it will die because it cannot adapt to the environment.

The conclusion is: swordfish cannot be cultured artificially.

There are two main types of saury on the market, East China Sea saury and South China Sea saury.

The distinction is as follows:

Size: East China Sea saury is smaller than South China Sea saury.

After cooking: South China Sea saury has granular hard bones in its body, but East China Sea saury does not.

The most significant difference is: Nanhai’s eyes are yellow.

Taste: East China Sea saury is better than South China Sea saury, and the price is also more expensive than South China Sea saury.

The swordfish belongs to the bony fish class Perciformes and the family Hairtails in the subphylum Vertebrates under the phylum Chordata. Also known as saury, crony, fat ribbon, oil ribbon, tooth ribbon, etc., they are ferocious in nature. Qingdao and Rizhao are cities along the Yellow Sea called _鱼. The body of the hairtail is flat as a band on the sides, silver-gray in color, the dorsal and pectoral fins are light gray with very small spots, and the tail is black. The head of the hairtail has a large pointed mouth and gradually tapers to the tail. The height is twice the length of the head, and the total length is About 1 meter. It is ferocious in nature and feeds mainly on shrimps and squid. Mainly distributed in the Western Pacific and Indian Ocean, it is distributed in China's Yellow Sea, East China Sea, Bohai Sea and South China Sea. It is also known as China's four seafood along with large yellow croaker, small yellow croaker and squid.