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Bornella stellifer.jpg
Bornella stellifer
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia
clade Euthyneura
clade Nudipleura
clade Nudibranchia
clade Cladobranchia
clade Dendronotida
Superfamily: Tritonioidea
Family: Bornellidae
Genus: Bornella
Gray, 1850
See text

Bornella is a genus of sea slugs, specifically dendronotid nudibranchs in the family Bornellidae.

There has not been much research on this genus. Their biology is mostly unknown, except that they seem to feed exclusively on hydroids.


These nudibranchs occur in the Indo-West Pacific. In addition there is one species in the tropical eastern Pacific, and one species in the western Atlantic.[1][2]


Their body is covered with cerata-like dorsal and lateral outgrowths, with finger-like branches. They have an attached cluster of gills. Their rounded head shows on each side of the mouth a tentacle, with tiny finger-like papillae. The sheath of the rhinophore stands high and resembles the dorsal processes. Feeds on hydroids.

The various species differ in their color pattern and their number of dorsal and lateral outgrowths and the number of branches on their rhinophore sheath.


These nudibranchs are characterized by an unpaired oral gland.

In their genital system, the male duct is separate from the female duct.


Species within this genus include:[3]

Invalid species names include:

  • B. semperi Crosse 1875 (nomen nudum)


  1. ^ Pola, M., Rudman, W. B. & Gosliner, T. M. (2009) Systematics and preliminary phylogeny of Bornellidae (Mollusca: Nudibranchia: Dendronotina) based on morphological characters with description of four new species. Zootaxa, 1975, 1-57
  2. ^ Rudman, W.B., 2009 (Jan 27) A revision of the genus Bornella. [Message in] Sea Slug Forum. Australian Museum, Sydney.
  3. ^ Bouchet, P. (2015). Bornella Gray, 1850. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-02-10.