You’d probably walk past a chiton without even seeing it. These creatures often look like nothing more than another speck of seaweed on the crusty intertidal rocks. But it sees you. At least, if it’s ...

As a fish swims over the ocean floor, it’s being watched by hundreds of rocks. The rocks are actually the eyes of a chiton, an armoured relative of snails and other molluscs. Perhaps uniquely among ...

Diagrams (top) and electron microscope images (bottom) of chiton shells. From left to right: Aesthetes (green) are fount on all chitons, while shell eyes (blue) and eyespots (red) only evolved in a ...