Roboastra gracilis
Encyclopedia
Roboastra gracilis is a species
of sea slug
, a nudibranch
, a marine
gastropod mollusk in the family Polyceridae
.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of sea slug
Slug
Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...
, a nudibranch
Nudibranch
A nudibranch is a member of what is now a taxonomic clade, and what was previously a suborder, of soft-bodied, marine gastropod mollusks which shed their shell after their larval stage. They are noted for their often extraordinary colors and striking forms...
, a marine
Marine (ocean)
Marine is an umbrella term. As an adjective it is usually applicable to things relating to the sea or ocean, such as marine biology, marine ecology and marine geology...
gastropod mollusk in the family Polyceridae
Polyceridae
Polyceridae is a taxonomic family of sea slugs, dorid nudibranchs, marine gastropod mollusks within the Superfamily Polyceroidea.- Taxonomy :...
.
Description
Robastra gracilis is a relatively small nudibranch reaching only 20–25 mm (2-2.5 cm) in length.External links
- http://www.seaslugforum.net/robograc.htm
- http://www.museum.wa.gov.au/dampier/species_view.asp?speciesID=1708