PULLMAN, Wash. – Mollusks, from land snails and slugs to oysters and mussels in the sea, have a few things in common. They have a head. They have a soft middle part that holds their organs. Then, some have a muscle that’s known as a “foot.”
This foot helps mollusks dig and attach to rocks. It also helps them travel, but not very fast. When the mollusks are young tiny things floating in the ocean, that’s when they really start to move.
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