The green hairs on the snail shells are edible. The green hairs on the snail shells are moss. Just brush them off. It's not heavy metal pollution.

Snails generally refer to mollusks of the family Snails, belonging to the phylum Mollusca, class Gastropoda, subclass Snails, and subclass Snails. Field snails are distributed in most parts of China. Field snails have high requirements for water quality and have low yields. Can be caught in summer and autumn. Chinese round snails are commonly found in fresh water. Field snails are dioecious. The method of distinguishing male and female field snails is mainly based on the shape of their right antennae. The right antennae of male field snails are curved inward to the right (the curved part is the male genitalia). In addition, the female snails are large and round, while the male snails are small and long. The field snail is an ovoviviparous animal with a unique reproductive method. The embryonic development of the field snail and the development of the offspring are completed within the mother's body. From the fertilized egg to the birth of the snail, it takes about one year to gestate in the mother's body. Field snails lay eggs in batches and start to reproduce from March to April every year. While the young snails are being produced, the female and male parent snails mate and fertilize, and at the same time, the young snails to be produced the following year are conceived in the mother's body. One mother snail produces approximately 100 to 150 young snails throughout the year.