Cap-Shaped False Limpet

Montfortula rugosa

Montfortula rugosa, known as the cap-shaped false limpet, is a marine gastropod that typically has a shell size ranging from 9 mm to 25 mm. This species is characterized by its cap-like shape, which distinguishes it from other limpets. Divers may notice its unique form when exploring rocky substrates or shallow waters where it resides. This species is distributed across various regions, including Australia, from Western Australia to South Queensland, as well as Tasmania and New Zealand. Montfortula rugosa is primarily found in benthic environments, often inhabiting depths shallower than 40 meters, with most occurrences recorded at depths of about 10 meters or less. The cap-shaped false limpet feeds on algae and organic matter, utilizing its radula to graze on these resources. It has a reproductive strategy typical of many in its order, where it is likely a gonochoric species that engages in broadcast spawning. This life cycle involves embryos developing into planktonic larvae before maturing into adults. Encounters with Montfortula rugosa during dives can be common, especially in suitable habitats. While not evaluated by the IUCN, divers should approach these creatures with care, as they are an integral part of their ecosystems.