Click the thumbnail photos to enhance!
I've seen the second variant only two times at Cabilao and at Moalboal, Cebu, the first variant is pretty common.
This picture of the second variant was identified by David W. Behrens (Chromodoris dianae is named after his wife).
More information on Chromodoris dianae are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 1 March 2017, Chromodoris dianae Gosliner & Behrens, 1998
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Chromodoris_dianae.htm