Noble Chiton

Eudoxochiton nobilis

Eudoxochiton nobilis, known as the noble chiton, is a large species found exclusively in New Zealand. Adults can reach lengths of up to 110 mm and have an oval shape with a leathery girdle that is covered in short bristles. Their coloration ranges from dark brown to olive-green, and their valves may be encrusted or eroded, featuring numerous shell eyes on their surfaces. Juveniles differ significantly in appearance, appearing flatter and displaying mottled hues of pink, brown, green, and yellow, often hiding under rocks or boulders in sandy or gravelly substrates. This chiton inhabits open rock surfaces within kelp beds, on boulders, and occasionally in rockpools. It is typically found in the low intertidal zone and can be encountered at depths of up to 30 m around the two main islands of New Zealand, as well as Stewart Island and the Chatham and Kermadec Islands. The noble chiton is sessile, remaining fixed to the substrate, and feeds primarily on algae. Reproduction involves the release of eggs that hatch into planktonic larvae, which eventually settle on the bottom as young adults. Encounters with noble chitons during dives can be intriguing, as divers may observe their unique shapes and colors against the rocky backgrounds of their habitats. The noble chiton is currently listed as Not Evaluated in terms of conservation status, indicating that its population trends are not well-documented.