Most chitons feed by rasping algae and other encrusted food off of the rocks on which they crawl. One genus is predatory, trapping small invertebrates under the fringe of the mantle, and then eating the captured prey. In some chitons, the radula has teeth tipped with magnetite, which hardens them.

What structure do the chitons use for feeding What do they eat?

Like many other molluscs, chitons feed with a thin strap bearing rows of teeth known as the radula.

What do most chitons feed on?

Most chitons are herbivorous and feed on algae and other sedentary organisms, including sponges, bryozoans, and coelenterates, which they scrape off the substrate or devour using a tongue-like organ, set with teeth (radula), which can be protruded and then retracted.