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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.
Costasiella kuroshimae (also known as a leaf slug, sea sheep, or leaf sheep) is a species of sacoglossan sea slug. Costasiella kuroshimae are shell-less marine opisthobranch gastropod mollusks in the family Costasiellidae. [1] Despite being animals, they indirectly perform photosynthesis, via kleptoplasty. [2]
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.
The nudibranchs are able to avoid digesting these protists, and sequester them in their tissues instead. This process is somewhat reminiscent of the relationship between the Sacoglossan sea slugs and the living chloroplasts that they are able to sequester. Both these nudibranchs and the sacoglossans have been referred to as "solar-powered sea ...
Flabellina is a genus of sea slugs, specifically aeolid nudibranchs. These animals are marine gastropod molluscs in the family Flabellinidae. [3] Taxonomic history
Generally, Chromodoris annae is a documented docile species of nudibranch. Despite the record of non-aggression, there was one reported case of intraspecific aggression between two Chromodoris annae sea slugs. Both nudibranchs were using a foot to keep them attached to the substrate below, but they were intertwined one on top of the other.
Jorunna funebris, commonly called the dotted nudibranch, is a species of sea slug. It is a dorid nudibranch , which is a shell-less marine gastropod mollusc in the family Discodorididae . [ 2 ] The genus Jorunna is composed of roughly 15 other species of nudibranchs, which feed on a variety of sponges.