Chitons have eight overlapping plates that make up their shell. There is movement between the plates so they can curl up in a ball or remain secularly clamped onto uneven surfaces. The plates develop a new growth ring each winter. The patterns on the plates can help identify the species. Surrounding the body and the shell of the chiton is a decorated girdle.
They live on hard surfaces and are common in rockpools, under rocks and in cracks between rocks.
They have a set of teeth that looks like a wood rasp. It is called a radula. It is used for feeding by scraping the surface of seaweed.
Chitons use their strong muscular foot for moving slowly and gripping onto rocks. Trying to pull them from rocks when they have a strong grip can damage them.