This undescribed species of Roboastra is one of the wildest looking and nastiest Branchs in town. This is, if in town for you is the Galapagos Islands.
Included recently in the newly published Field Guide to Marine Molluscs of Galapagos by Cleve Hickman and Yves Finet, it feeds voraciously on its sister Polycerid species, Tambja mullineri. This species has white gills, atop a yellow and blue striped body. The rhinophores are orange. There is no species it can be confused with. Not much is known about this species, aside from the fact that it is common enough to be included in two recent books. It reaches 60 mm in length, and seems to be endemic to the Galapagos Archipelago.
Had Darwin been a diver, he would surely have loved to meet up with this critter.
Anne and her husband reside in Delray Beach, Florida. When not diving Florida waters, they spend their time diving and cruising the Bahamas on their trawler.
You can drop Anne a note at firstname.lastname@example.org
David W. Behrens
Pacific Coast Nudibranchs
Send Dave mail at email@example.com