The chitons' eight plates differentiate them from all other molluscs. These omnivores spawn grey-green eggs, and fertilization occurs externally. Miniature adults form by sixteenth day.
Herbivore found on crustose and erect coralline algae, its major food and the source of its pigment. 15 mm long, 10 m deep. Its scraping organ, the radula, contains magnetite, hard enough to scrape the corallines. The chitons are broadcast spawners with external fertilization.
