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It has zooxanthellae, it is like other members of the genus Phyllodesmium what Bill Rudman calls "Solar-powered Sea Slugs".
This species was described as Phyllodesmium lizardensis I changed the ending of the specific name accoring to WoRMS.
Pretty similar are at least 4 " Xenia Mimics":
Phyllodesmium crypticum which has very nodulose cerata, especially along the edges,
Phyllodesmium jakobsenae which has flattened, slightly coiled cerata with brownish pigment along the edges near the tip (1 cream longitudinal band)
Phyllodesmium hyalinum which differs by white 'frosting' on the cerata,
Phyllodesmium sp. 04 which differs by rounded, elongate cerata with several longitudinal lines of brown pigmentation, and
Phyllodesmium sp. 08 on MEDSLUGS on which Ingo Burghardt writes "the brownish pigments on the cerata are arranged different, the cerata are thin and also arranged different from Phyllodesmium jakobsenae."
Marli Wakeling has a picture of a similar specimen on her website, no location given,
pictures of Phyllodesmium lizardense from the type localty, the Lizard Island, Australia are here.
The specimen #2 was identified by Dr. Richard C. Willan, the specimen #3 was misidentified and posted on 26 November 2014 at these websites
as Phyllodesmium hyalinum Ehrenberg, 1831.
Burghardt I., Schrödl M. & Wägele H. 2008. Three new solar powered species of the genus Phyllodesmium Ehrenberg, 1831 (Mollusca: Nudibranchia: Aeolidoidea) from the tropical Indopacific with analysis of their photosynthetic activity and notes on biology.
Journal of Molluscan Studies, 74(3): 277-292
Gofas, S.; Bouchet, P. (2015). Phyllodesmium lizardense. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=457000 on 2016-08-30
More information on Phyllodesmium lizardense as Phyllodesmium lizardensis are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 30 June 2017, Phyllodesmium lizardense Burghardt, Schrödl & Wägele, 2008
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Phyllodesmium_lizardense.htm