Hairy Elysia

Elysia tomentosa

Elysia tomentosa is a small sacoglossan sea slug, reaching a maximum length of about 3.0 cm. It is characterized by its distinctive hairy appearance, which helps differentiate it from other sea slugs. This species is typically found in the Indo-West Pacific and the Mediterranean Sea, with occurrences recorded from Hong Kong to Australia. Its preferred habitats include shallow, benthic environments, often less than 40 meters deep, with most sightings occurring shallower than 20 meters. This sea slug primarily feeds on coarse, dark green algae, specifically Cladophora species. Its diet is herbivorous, relying on these algae for sustenance. Elysia tomentosa is assumed to have a life cycle and reproductive behavior typical of many sea slugs, although specific details on its breeding habits are not well-documented. Diving encounters with the Hairy elysia can be intriguing, as divers may spot it grazing on algae-covered surfaces. Its cryptic coloration and texture allow it to blend into its surroundings, making it a challenge to find. Observers should approach carefully to avoid disturbing this delicate creature. The conservation status of Elysia tomentosa is currently not evaluated, indicating a lack of comprehensive data on its population trends and threats.