Shield Limpet

Lottia pelta

Shield Limpets are marine gastropods with shells that typically measure between 2.5 and 5.4 cm in width. Their shells are broadly elliptical to oval, moderately elevated, and feature a grayish color with irregular radial stripes. The apex of the shell tilts towards the front, and the sides are slightly convex. These limpets can change the morphology and color of their shells based on their habitat and diet, with darker shells observed on kelp holdfasts. They are primarily found in the intertidal zone, from Alaska to Baja California, often on rocky surfaces and kelp, and are most commonly located at depths shallower than 10 meters. As dominant herbivores, Shield Limpets graze on a variety of algae, including microscopic forms and larger species. They reproduce through seasonal broadcast spawning, where both males and females release their gametes into the water for external fertilization. The fertilized eggs develop into free-swimming trochophore larvae, which then transform into planktonic veliger larvae before settling onto suitable substrates to undergo metamorphosis into benthic juveniles. Once mature, they return to their home scar after feeding. Divers may encounter Shield Limpets while exploring rocky intertidal areas, often in association with brown algae. These limpets can be found in mussel beds and are known to be vulnerable to changes in salinity and temperature, playing a significant role in the intertidal ecosystem. Their conservation status has not been evaluated, indicating their presence in diverse marine environments.