This 2016 paper seems to indicate that there is extreme polymorphism in this species: http://www.sciencedirect.com/science/article/pii/S1055790316301750?via%3Dihub Especially check out the graphic at the bottom of the abstract.
What I wrote in 2015: Felimida clenchi - Harlequin Sea Goddess - ID as per Humann and deLoach, p. 218. Kudos to guide Nick for the find! About 1/2" long. 10' depth.