A snail s periostacum is a coating that often hides a beautiful shell underneath. A snail s periscope is usually called a siphon. Snails generally use smell, sight and feel to find food. Next Question 7. Bivalves don t have any teeth, at least not teeth to chew or bite with.
Most bivalves eat by filtering microscopic plants and animals from the water.
Most gastropods and cephalopods have teeth called radula that they rasp over food as the first stage of digestion. Next Question 6. Queen Conchs are found in the Atlantic Ocean. Tiger cowries and spider conchs are both found in the tropical Pacific. Abalone live in the Pacific Ocean and are collected for food.