These animals are dioecious, which means that they have separate sexes. They do not copulate, so they do not ever engage in intercourse. However, the males do release sperm into the water through respiratory currents. In this case the female will release her eggs into the water in strings and the sperm that the male released will meet up with the eggs, fertalization will then occur. Another structure of the chiton is the internal side of the mouth.
Chitons typically feed on algae and other organisms.
They use their radula to scrape surfaces and bring the food inside to digest. The radula utilizes its seventeen teeth in each row to scrape away algae. Inside the mouth is the chitin-lined buccal cavity and the radula extends out of that buccal cavity. In order for them to feed they must first send out the subradula, that hangs from the roof, which attaches to the surface. Once attached the radula then extends to begin the scraping process.