You are not going to find this amazing new species unless you look under volcanic rocks which are encrusted with a salmon, pinkish-red sponge. Found on page 404 of Indo-Pacific Nudibranchs and Sea Slugs. This is one of many undescribed species we will enjoy during my three - one-week workshops to be held at the Villa Markisa dive resort in Tulamben, Indonesia.
This aeolid nudibranch has a broad frontal margin, and numerous thin, curved cerata set on arches. The mid dorsal region is free of cerata. The body color is reddish-orange with fine white markings.
The egg ribbon is a wide spiral of small egg packets. It may vary in color from orange, as seen here is Christiane's photo to white. Hopefully, during the workshops we will learn what this species feeds on. But I am betting it's a small sea anemone.
Gig Harbor, Washington