Although a bit more orange in the body, this appears to be the species called Flabellina sp. 3 in Gosliner et al (2018). Externally it looks as though it would fall into Coryphellina, although DNA analysis may be required to confirm that. We have seen a number of specimens at various sites around Tulamben. The first few photos are of specimens observed in November 2012.
The three photos below show specimens found in November 2014. They seem to be associated with the magenta hydroid in the lower photos.
One more from October 2018.
This one is a bit unusual but still is apparently the same species.
Created 26 December 2012
Updated 17 March 2024