Phestilla lugubris is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Trinchesiidae.Picton, B.; Gofas, S.; Bouchet, P. (2017). Phestilla lugubris (Bergh, 1870). In: MolluscaBase (2017). Accessed on 2017-11-09.
Distribution This species was described from the Philippines. It is widespread in the tropical Indo-Pacific region.Rudman, W.B., 1999 (May 17) Phestilla lugubris (Bergh, 1870). [In] Sea Slug Forum. Australian Museum, Sydney. Its main prey is coral genus Porites.
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