Chitons are related to limpets, but instead of one single shell, they have eight protective plates. Chitons also have a strong foot that holds them to rocks. In addition to acting as a defense against predators, this ensures chitons don’t get knocked off their rocks by crashing waves. Tip: Pronounce it like “KITE-en.”
Why they’re cool: Chitons are living fossils! Fossil records show chitons existed more than 400 million years ago.
Nicole J. Persun is an award-winning novelist, writing instructor and the former digital content producer for ParentMap. Read her latest books under the pen name Jennifer Gold.