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The cerata are can easily be cast off (autotomised) when the animal is disturbed.
This species was the the "Opisthobranch of the Week" at Michael D. Miller's Slug Site. It is as Cyerce sp. 5 in Gosliner et al. (2015) page 72 bottom right. There are some pictures of it as Cyerce sp. e501 from the Marshall Islands at http://www.underwaterkwaj.com/nudi/sacoglossans/e501.htm online.
Gosliner, T.M, D.W. Behrens & Á.Valdés. 2015. Nudibranch &Sea Slug Identification Indo-Pacific.
New World Publications Inc. Jacksonville, FL. 408 pp.
How to cite:
Köhler, E. (2018), published 24 March 2018, Cyerce sp. 03 Genus: Bergh, 1871
available from https://www.Philippine-Sea-Slugs.com/Sacoglossa/Cyerce_sp_03.htm