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The exact systematics of nudibranchs are a topic of recent revision. Traditionally, nudibranchs have been treated as the order Nudibranchia, located in the gastropod mollusc subclass Opisthobranchia (the marine slugs: which consisted of nudibranchs, sidegill slugs, bubble snails, algae sap-sucking sea slugs, and sea hares). [44]
The nudibranch Nembrotha aurea is a gastropod. A sea cucumber also looks slug-like and is sometimes loosely called a "sea slug", but it is not a gastropod.. Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs.
This species has a maximum size of 70 mm. [2] The background color is deep black. The margin of the parapods and body are marked with a thin electric blue line. The two rather long "tails" at the end of the animal are characteristic of the genus Chelidonura, the left one is always longer.
The nudibranch is thought to feed on corals of the genus Xenia, and has been spotted interacting with flatworms of the genus Waminoa. [10] Dissection of its stomach contents revealed a diet of shelled caenogastropods. [1] Due to its strange appearance, the nudibranch has been dubbed the "holy grail of nudibranchs" by underwater photographers ...
In the order of Nudibranchia, these 'sea slugs' are not considered marine worms but instead mollusks who lack a shell which is a main characteristic in classification. Nudibranchia exhibit bilateral symmetry in overall body structure as well as in gill feature.
Cryptobranch dorid nudibranchs (previously known as the taxon Cryptobranchia), are nudibranch sea slugs within the clade Doridacea. These slugs are called "cryptobranch," meaning "hidden gill", because they are able to retract their gills into a gill pocket, in contrast to nudibranchs in the traditional group phanerobranchs (or Phanerobranchia), which taxon is probably paraphyletic (in other ...
Peltodoris atromaculata, more commonly known as the dotted sea slug or sea cow, is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Discodorididae. [1] It dwells in salt water up to the depth of 40m. It is exclusively found in precorralligene and coralligene communities and is very common in such communities. [2]
Sea clown triopha Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca Class: Gastropoda Order: Nudibranchia Superfamily: Polyceroidea Family: Polyceridae Genus: Triopha Species: T. catalinae Binomial name Triopha catalinae (Cooper, 1863) Triopha catalinae, commonly known as the sea clown triopha or sea clown, is a species of colorful sea slug called a nudibranch. Sea ...