The intestines of the conch.

Like some small conches, you should not eat the black stuff at the back. This thing is the intestines of the conch and there are a lot of sand. If these things are eaten in the mouth, it will seriously affect the conch. Overall taste.

Conch belongs to the mollusc gastropod class, Mollusca phylum. Shellfish are mainly divided into five categories, with more than 70,000 species in the world. The marine species can be collectively called conches.