The snails that you show are very beautiful. As we know, snails are animals that have shells and move very slowly. If we talk about shells, snail shells like the one in the picture you show have a lot of nutritional content in them.I once read in an article that snail shells are used as nano calcium which has a level of calcium content that is good enough to be used as artificial feed.What I mean by artificial feed is artificial feed for shrimp, Because shrimp growth requires high levels of calcium when the shrimp molt. So in one study, nano calcium from snail shells like this was also used.