Heath's Chiton

Stenoplax heathiana

Heath's Chiton is a narrow-bodied chiton that can reach lengths of up to 7.6 cm. It is characterized by its pale foot and a cream-colored girdle, with a distinctive wide 8th plate that helps in its identification. This species is typically found under rocks in the sandy middle and low intertidal zones along the Pacific coast, from Mendocino County in California to Puerto Santo Tomás in Baja California. The habitat includes rocky shores where the chiton resides beneath stones, often in areas partly embedded in sand or gravel. Feeding primarily on algae that accumulates on the rocks, Heath's Chiton is mostly nocturnal, making it more active during the night. Its reproductive cycle involves eggs that hatch into trochophore larvae, which metamorphose directly into young adults without going through a veliger stage. This direct development is typical of many mollusks, allowing for a relatively straightforward life cycle. Encounters with Heath's Chiton during dives can be intriguing, as they blend well with their rocky environments. Divers may spot them clinging to the undersides of rocks, where they are often well-camouflaged. While specific conservation status details are not provided, the species is not evaluated by the IUCN, indicating a lack of comprehensive assessment regarding its population health.