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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 name "sea slug" is also often applied to the sacoglossans (clade Sacoglossa), the so-called sap-sucking or solar-powered sea slugs which are frequently a shade of green. Another group of main gastropods that are often labeled as "sea slugs" are the various families of headshield slugs and bubble snails within the clade Cephalaspidea.
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.
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 ...
Costasiella ocellifera is a small (5–13 mm) species of sea slug, a shell-less marine gastropod mollusk in the family Costasiellidae. [2] Costasiella ocellifera, and other members of the family Costasiellidae are often mistakenly classified as nudibranchs because they superficially resemble other species of that group, but they are actually a part of the Sacoglossa superorder of sea slugs ...
Melibe is a genus of sea slugs, nudibranchs, marine gastropod mollusks in the family Tethydidae. [2]Most nudibranchs are carnivores, but their prey is usually sessile or slow-moving animals such as sponges or bryozoans.
Phylliroe is a genus of average sized (up to 5.5 centimetres or 2.2 inches), highly transparent pelagic nudibranchs, marine gastropod molluscs in the order Opisthobranchia, that consists of two known species. [2] It is notable for being an open-ocean hunter that resembles a fish in body plan and locomotion, an example of convergent evolution. [2]