Cream with a black frilled edge, and the mantle ripples as it moves.
A dorid to about 6 cm, cream to pale fawn with a black margin that runs the whole way round the mantle and continues along the edges of the rhinophores and the gill plume. The mantle skirt is wide, thin and strongly undulating — it ripples continuously as the animal moves, which is the feature most divers register before the colour. Older sources place it in Glossodoris; it was moved to Doriprismatica in a revision of the group.
Feeds on sponges, chiefly Dysidea, and is one of the most frequently seen nudibranchs across the Indo-Pacific, common enough to be walked past on every dive. It is often found in pairs and the white spiral egg ribbon is laid beside the food sponge. Recorded from the shallows to about 30 m. The ripple is what to photograph: a still frame of this animal shows a cream oval, and a frame taken as the skirt lifts shows what it actually looks like in the water.
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.
