Coryphella nobilis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Flabellinidae. Ekimova I., Carmona L., Mikhlina AL., Grishina D., Stanovova M.V., Schepetov D.M., Hoover C., de Souza-Canal J., Kuznetsov K.O., Valdés A.; (2026). Neither "lumpers" nor "splitters": A global revision of Flabellinidae s.l. nudibranchs (Gastropoda: Heterobranchia: Nudibranchia). PLoS One 21(5): e0347759.
Distribution Coryphella nobilis was described from a single specimen dredged in 145 m depth off Cape Cod in 1879. It is widely distributed in the northern Atlantic Ocean from Norway south to Ireland and on the North American coast south to New England.ITIS Retrieved July 5, 2012
Description This species is translucent white with opaque white markings. The digestive gland in the cerata is either orange or red in colour. The rhinophores are pale yellow-brown in colour and covered with small papillae.Rudman, W.B., 2001 (June 28) Flabellina nobilis (Verrill, 1880). [In] Sea Slug Forum. Australian Museum, Sydney. Retrieved April 13, 2015seawater.no Retrieved July 5, 2012
This species grows to 40–50 mm (4–5 cm) in length. The maximum recorded body length is 63 mm.Welch J. J. (2010). "The “Island Rule” and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi:10.1371/journal.pone.0008776.
Ecology Minimum recorded depth is 20 m. Maximum recorded depth is 190 m.
References
Further reading Korshunova T.; Fletcher K.; Martynov A. (2025). The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case Zoological Journal of the Linnean Society. Volume 204, Issue 4, August 2025.