Nudibranchs belong to the order Nudibranchia, a group of soft-bodied marine gastropod molluscs that shed their shells after their larval stage. They are noted for their often extraordinary colours and striking forms, and they have been given colourful nicknames to match, such as "clown", "marigold", "splendid", "dancer", "dragon", and "sea rabbit". Currently, about 3,000 valid species of nudibranchs are known.
Opisthobranchs is a now informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping.
Taringa is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod molluscs in the family Discodorididae.
Roboastra is a genus of sea slugs, polycerid nudibranchs, marine gastropod molluscs in the family Polyceridae. They are carnivorous, feeding on other species of nudibranch.
Tambja is a genus of colorful sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Polyceridae.
Tyrannodoris tigris is a species of sea slug, a polycerid nudibranch, a marine gastropod mollusc in the family Polyceridae. It is a known predator of Tambje eliora and Tambje abdere, two species of smaller nudibranchs. The chemical extracts of all three species contain tambjamines, which were traced to Sessibugula translucens, a food source of these species. It is hypothesized that tambjamines are a chemical defence mechanism against feeding by the spotted kelpfish Gibbonsia elegans.
Felimare bilineata is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Felimare cantabrica is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Risbecia nyalya is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
Baenopsis baetica is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinopsidae.
Fjordia insolita is a species of sea slug, an aolid nudibranch, a marine gastropod mollusk in the family Flabellinidae.
Doto furva is a species of sea slug, a nudibranch, a marine gastropod mollusc in the family Dotidae.
Trapania hispalensis is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Trapania orteai is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
Algarvia alba is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusc in the family Facelinidae.
Amphorina linensis is a species of sea slug or nudibranch, a marine gastropod mollusc in the family Eubranchidae. Several species of Eubranchus were transferred to Amphorina in 2020.
Diaphorodoris papillata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Calycidorididae.
Tyrannodoris is a genus of sea slugs, polycerid nudibranchs, marine gastropod molluscs in the family Polyceridae. Most of these species were formerly considered to belong to the genus Roboastra. They are carnivorous, feeding on other species of nudibranch, especially similar looking species of Tambja.
Roboastra tentaculata is a species of sea slug, a polycerid nudibranch, a marine gastropod mollusc in the family Polyceridae.
Tambja ceutae is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae.
