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When disturbed species of Moridilla unroll the large rolled cerata and thrash them around for defense.
The specimen #1 was identified by Dr. Richard C. Willan, thanks!
Another aeolid with similar behaviour is Phidiana salaamica, which might be better placed in the genus Moridilla Bergh, 1888.
Pretty similar is Moridilla brockii Bergh, 1888 which lacks the white mottling on the cerata, and differs by a completely orange-red rhinophoral clavus.
The specimens #2 and #3 were posted before as M. brockii at these websites.
How to cite:
Köhler, E. (2017), published 21 November 2017, Moridilla sp. 01 Genus: Bergh, 1888
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Moridilla_sp_01.htm