Chiton
(Tonicella lineata)

Found clinging to rocky shores across the world’s oceans, the Chiton is an ancient mollusk protected by eight overlapping aragonite shell plates that allow it to curl up like an armadillo when threatened.

What makes the Chiton truly remarkable though is its teeth — made from magnetite, one of the hardest biological materials ever discovered! These tiny teeth are strong enough to scrape algae directly off solid rock!