Ridge-Tailed Dorid

Diaphorodoris lirulatocauda

Diaphorodoris lirulatocauda is a small sea slug that can reach a maximum length of 1.2 cm. This species is characterized by its distinctive ridge-like tail, which helps differentiate it from other nudibranchs. It is found along the Pacific coast, ranging from Alaska down to Baja California, Mexico, and typically inhabits benthic environments. Divers may encounter this species in various habitats, including rocky reefs and kelp forests, where it thrives in both subtropical and boreal climates. As a simultaneous hermaphrodite, Diaphorodoris lirulatocauda engages in unique mating behavior. During mating, individuals will dart their reproductive organs toward each other, determining which one will act as the male. After mating, eggs are laid on a suitable substratum, where they develop into a planktonic larval stage before maturing into adults. Encounters with this nudibranch can be intriguing for divers, as they often blend into their surroundings, making them somewhat cryptic. Observing their behavior and interactions with the environment can provide insight into their ecological role. The species has been recorded at various dive sites along the Pacific coast, although its conservation status has not been evaluated.