This is one of the fried snails that we usually eat in Beihai. What is in your picture is edible. If it is a crab, you are a hermit crab. You can't eat it. The "door" in your mouth is a real snail.

This kind of snail is big or small, and the fried snail stall is generally the big one. The sharp end will be clipped off with pliers before frying, so that the snail meat can be easily sucked out. If it's a small one, we use toothpicks to pick the meat after cooking.

In short, it is edible.