Mask Limpet

Lottia persona

Lottia persona is a large limpet that can grow to a length of up to fifty millimetres. Its shell is dark olive-green, featuring fine white markings and subtle radial ribs, which may be worn down due to erosion. The apex of the shell is positioned about one third of the way along, and the anterior slope is either straight or slightly concave, helping divers identify it among similar species. This species is distributed along the North American Pacific coast, ranging from Alaska to central California. It thrives in the high and mid-intertidal zones, often found in crevices, caves, and under overhangs on sheltered rocky coasts. Lottia persona is primarily nocturnal, grazing on micro-algae when the rocks are wet, which makes it less visible during the day. In terms of reproduction, Lottia persona is a gonochoric species that engages in broadcast spawning. The embryos develop into planktonic trocophore larvae before transitioning into juvenile veligers, eventually maturing into adults. Encountering this limpet while diving can be intriguing, as they often blend into their surroundings, making them a cryptic species. The conservation status of Lottia persona is categorized as Not Evaluated, indicating that there is currently no assessment of its population status. However, divers may observe them frequently at various dive sites, as they are common in their habitat.