1, refrigerated in the refrigerator. After buying snails, they can be raised in water soaked in sea salt and then put in the refrigerator for refrigeration. Before cooking, take it out, wash it with clear water and wash off the sediment.

2. Generally speaking, a fresh conch can close its shell, touch its horns with your hands and retract it into the shell, while a dead conch can't close its shell and its outstretched tentacles don't respond, so you can pick it out and throw it away.