The ink of cuttlefish is edible. The ink of cuttlefish is the basic substance released when it escapes from danger, which darkens the surrounding sea water and confuses the enemy. Introduction of eating cuttlefish rice in Jiangsu and Zhejiang provinces. In foreign countries, health foods such as bread, bean jelly and surimi processed with squid ink have been listed.

The ink of cuttlefish contains a mucopolysaccharide, which has certain anticancer effect. The ink of cuttlefish contains anticancer substances, which has attracted more and more public attention. After processing, cuttlefish ink is a valuable medicinal material with good hemostatic function.

Introduction of Squid: In the vast East China Sea, there is such a creature that swims like a fish, but it doesn't belong to a fish. People used to call it cuttlefish, squid or mullet. It is one of the famous seafood products in China. In Zhejiang, it is called "four economic fish" together with large yellow croaker, small yellow croaker and hairtail, and is deeply loved by consumers.

The flesh of squid is edible, and the ink in its ink sac can be processed into industrial use. Ink sac is also a medicinal material, and the inner shell can feed caged birds with calcium. The viscera of cuttlefish can be squeezed into viscera oil, which is a good raw material for tanning. Its eyes can be made into eyeball glue, which is the best glue. Common squid in China are squid (commonly known as squid), golden squid and needleless squid. Squid is one of the four major seafood products in China (Pseudosciaena crocea, Pseudosciaena crocea, hairtail and squid), with large catch, delicious meat and rich nutrition.