Rocky Shore: Chitons
A type of mollusc in the class polyplacophora, chitons are marine animals which have eight plates that run along their back. These plates, which overlap slightly and articulate like vertebrae on a spine, are made of aragonite, a form of calcium carbonate that is also used by corals and other mollusks to make their shells.

Chitons typically eat algae and live in intertidal environments all over the world.
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