Cream with black lines and orange bands, ploughing across silt after sea pens.
An arminid to about 5 cm, the back cream to white with fine longitudinal black lines running its length and a band of orange along the mantle margin and around the head. The body is firm and flattened, the rhinophores are short and set right at the front, and — as in the whole family — there is no gill plume on the back; the gills are hidden under the mantle skirt.
Like Armina, it is a soft-bottom animal that works partly buried and is generally seen at night crossing open silt, leaving a shallow furrow. It feeds on octocorals, chiefly sea pens and soft corals growing in or on sediment, and a colony being eaten is often the reason a slug is where it is. The arminids are among the least photographed sea slugs on a muck site simply because they are found on the featureless ground divers cross quickly. Recorded from about 5 to 30 m.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.
