Comment from the photographer: Described in November 2008 by Alicia Hermosillo and Sandra Millen, this is a very strange aeolid (facelinid), not Flabellina rubrolineata. The the rhinophores are plain, not lamellate; it has only one row of teeth, not three rows, as Flabellina rubrolineata; but strangely the internal organs are arranged as in Flabellina rubrolineata.
ID by A. Hermosillo