About Eubranchus vittatus (Alder & Hancock, 1842)
This species, a nudibranch originally documented as a snail, has a slender, pale buff body speckled with fawn colour. Its head is relatively large and truncated at the front. The dorsal tentacles are slightly conical, wrinkled, and fawn-coloured, with pale tips. The oral tentacles are a similar fawn colour, and shorter than the dorsal tentacles. The gills (called branchiae here) are somewhat club-shaped, long, with blunt ends, and very pale fawn in colour, marked with three darker fawn-coloured bands. The gills are arranged in six or seven spaced-out rows along the sides of the body; the rows are largest towards the front, and hold four to seven gills each. This species was first described from deep water off Cullercoats, England. It has been recorded from Atlantic coasts of Europe, ranging from Norway south to Galicia, Spain.