''Cerberilla longibranchus'' is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

sea slug Sea slug is a common name for some Marine biology, marine invertebrates with varying levels of resemblance to terrestrial Slug, slugs. Most creatures known as sea slugs are gastropods, i.e. they are Sea snail, sea snails (marine gastropod moll ...

, an aeolid

nudibranch Nudibranchs () are a group of soft-bodied marine gastropod molluscs, belonging to the order Nudibranchia, that shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have b ...

, a marine

heterobranch Heterobranchia, the heterobranchs (meaning "different gill"), is a taxonomic clade of snails and slugs, which includes marine, aquatic, and terrestrial gastropod molluscs. Heterobranchia is one of the main clades of gastropods. Currently Hetero ...

mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Aeolidiidae Aeolidiidae, a family of aeolid nudibranchs, are a family of sea slugs, shell-less marine gastropod mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around ...

.Bouchet, P. (2015)
''Cerberilla longibranchus''.
In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2015-11-12

Distribution

This species was described from the

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

n Pacific Ocean. It has also been reported from Japan.Baba, K. (1976)
''The genus ''Cerberilla'' of Japan (Nudibranchia: Eolidoidea: Aeolidiidae), with the description of a new species.''
The Veliger, 18(3):272-280. p. 275.

Description

All ''Cerberilla'' species have a broad foot and the cerata are long and numerous, arranged in transverse rows across the body. This species is predominantly brown and the

cerata :''The tortrix moth genus ''Cerata'' is considered a junior synonym of ''Cydia (genus), Cydia. Cerata, singular ceras, are anatomical structures found externally in nudibranch sea slugs, especially in aeolid nudibranchs, marine animal, marine opi ...

are brown becoming almost black at the tips.

Ecology

Species of ''Cerberilla'' live on and in sandy substrates where they burrow beneath the surface and feed on burrowing sea anemones.

References

{{Taxonbar, from=Q13459862 Aeolidiidae Gastropods described in 1941