Felimare fontandraui

Felimare fontandraui is a dorid nudibranch characterized by its blue to purple body adorned with yellow lines along its sides, and a distinct yellow-cream line on its upper dorsum. Light blue streaks may also be present near the mantle edge, while the mantle is edged in orange. Its gills and rhinophores are black-purple, and there is notable color variation within the species. This nudibranch can reach a length of at least 30 mm and is primarily found in the Eastern Atlantic Ocean and the Western Mediterranean. Typically inhabiting rocky substrates, Felimare fontandraui is often associated with sponge gardens, where it feeds on yellow sponges from the genus Dysidea. Encountering this nudibranch during a dive can be intriguing, as divers may observe its slow movements and unique coloration. Breeding behaviors are not detailed in the sources, but nudibranchs generally exhibit hermaphroditic traits, allowing them to reproduce with any individual they encounter. Conservation status for Felimare fontandraui is not specified in the sources, indicating that further research may be needed to assess its population trends.