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.
Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails that, over evolutionary time, have either entirely lost their shells or have seemingly lost their shells due to having a significantly reduced or internal shell. The name "sea slug" is often applied to nudibranchs and a paraphyletic set of other marine gastropods without apparent shells.
Glaucus atlanticus is a species of sea slug in the family Glaucidae.
This glossary of ichthyology is a list of definitions of terms and concepts used in ichthyology, the study of fishes.
Dendronotoidea is a taxonomic superfamily of small colorful sea slugs or nudibranchs, aeolid nudibranchs.
Radiodonta is an extinct order of stem-group arthropods that was successful worldwide during the Cambrian period. They may be referred to as radiodonts, radiodontans, radiodontids, anomalocarids, or anomalocaridids, although the last two originally refer to the family Anomalocarididae, which previously included all species of this order but is now restricted to only a few species. Radiodonts are distinguished by their distinctive frontal appendages, which are morphologically diverse and used for a variety of functions. Radiodonts included the earliest large predators known, but they also included sediment sifters and filter feeders. Some of the most famous species of radiodonts are the Cambrian taxa Anomalocaris canadensis, Hurdia victoria, Peytoia nathorsti, Titanokorys gainessii, Cambroraster falcatus and Amplectobelua symbrachiata, the Ordovician Aegirocassis benmoulai and the Devonian Schinderhannes bartelsi.
Bornella is a genus of sea slugs, specifically dendronotid nudibranchs in the family Bornellidae.
The Dexiarchia are a suborder of sea slugs, shell-less marine gastropod molluscs in the order Nudibranchia. This classification is based on the study by Schrödl et al., published in 2001, who recognized within this clade two clades Pseudoeuctenidiacea and Cladobranchia.
The Cladobranchia are a taxonomic clade of nudibranchs, sea slugs, marine gastropod molluscs in the clade Dexiarchia.
Plocamopherus maculapodium is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusk in the family Polyceridae.
Plocamopherus pecoso is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusk in the family Polyceridae.
Kaloplocamus dokte is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Polyceridae.
Porophryne is a monospecific genus of marine ray-finned fish belonging to the subfamily Histiophryninae in the family Antennariidae, the frogfishes. The only species in the genus is Porophryne erythrodactylus, the red-fingered anglerfish, red-footed frogfish, Bare Island anglerfish or Sydney anglerfish, which is endemism to the waters off New South Wales in eastern Australia. Both the species and the genus were first described in 2014.
Dendronotus kalikal is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.
Dendronotus kamchaticus is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.
Dendronotus niveus is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.
Cabangus regius is a species of sea slug, a dendronotid nudibranch, a shell-less marine gastropod mollusc in the family Dendronotidae.
Bornella irvingi is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Bornellidae.
Dvulikiaspis is a genus of chasmataspidid, a group of extinct aquatic arthropods. Fossils of the single and type species, D. menneri, have been discovered in deposits of the Early Devonian period in the Krasnoyarsk Krai, Siberia, Russia. The name of the genus is composed by the Russian word двуликий (dvulikij), meaning "two-faced", and the Ancient Greek word ἀσπίς (aspis), meaning "shield". The species name honors the discoverer of the holotype of Dvulikiaspis, Vladimir Vasilyevich Menner.
Bornella pele is a species of nudibranch in the family Bornellidae. It is found in waters off Hawaiʻi, Australia, Japan, French Polynesia, and Réunion. The species epithet derives from Pele, the Hawaiian god of volcanoes, due to the nudibranch's red markings.
