I got a simple water proof camera. :) I found this one knee depth under water. ID reference: http://sapv.web.fc2.com//01kaigan/01-02mollusca/index.html
ãã¡ã¿ã¬ã¤. My wife got shells on beach in July and noticed one of them is living when we get back to home! I put it to salt water tank. We found it was moving in the tank.