Pseudobiceros 13
photo 1: Pupukea, O`ahu. 15 ft. (at night)
photo 2: Koloa Landing, Kaua`i
photo 3: Pupukea, O`ahu. (at night)
photo 4: Kevin Roe, Maalaea Bay, Maui

Specimen sent to Leslie Newman, who included it on her CD, where the top two photos appear, along with this description:. "Background colour brown with occasional white spots and/or splotches. Marginal band wide, light brown, with narrow black rim.... Generic determination uncertain." To this we add that the body is raised medially. Known only from Hawai`i, although Mike Miller has photographed a similar worm from Bali.

Update: Damaris Torres-Pulliza posted what is probably a juvenile on iNaturalist

BACK to solid color w marginal bands
BACK to spots or blotches