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Aeolidiidae, a family of aeolid nudibranchs, are a family of sea slugs, shell-less marine gastropod molluscs.

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Aeolidia is a genus of sea slugs, aeolid nudibranchs, marine gastropod mollusks in the family Aeolidiidae.

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Aeolidia filomenae is a species of sea slugs, an aeolid nudibranch, a marine gastropod mollusc in the family Aeolidiidae. Previously confused with Aeolidia papillosa, this species occurs on coasts of the NE Atlantic Ocean from Scotland south to Portugal.

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Aeolidia loui is a species of sea slugs, an aeolid nudibranch, a marine gastropod mollusc in the family Aeolidiidae. It has been regarded as the same species as the NE Atlantic Aeolidia papillosa but is now known to be a distinct species. Common names include shaggy mouse nudibranch, and shag-rug nudibranch.

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Aeolidia papillosa, known as the common grey sea slug, is a species of nudibranch in the family Aeolidiidae.

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Aeolidiella is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Aeolidiidae.

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Aeolidiella alderi is a species of sea slug, an aeolid nudibranch in the family Aeolidiidae. It is native to northwestern Europe where it occurs in the intertidal zone. It is a predator and feeds on sea anemones.

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Aeolidiella drusilla is a species of sea slug, an aeolid nudibranch in the family Aeolidiidae.

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Aeolidiella glauca is a species of sea slug, an aeolid nudibranch in the family Aeolidiidae.

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Anteaeolidiella is a genus of sea slugs, aeolid nudibranchs in the family Aeolidiidae.

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Anteaeolidiella chromosoma, common name colorful aeolid, is a species of sea slug, an aeolid nudibranch. It is a shell-less marine gastropod mollusc in the family Aeolidiidae.

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Anteaeolidiella indica is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae.

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Anteaeolidiella lurana, is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae.

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Anteaeolidiella oliviae, is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae.

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Baeolidia is a genus of aeolid nudibranchs, marine gastropod molluscs in the family Aeolidiidae.

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Baeolidia australis, is a species of sea slug, an aeolid nudibranch found from the west coast of Australia to New Zealand. It is a marine gastropod mollusc in the family Aeolidiidae.

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Baeolidia moebii is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Aeolidiidae.

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Baeolidia ransoni is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae.

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Baeolidia salaamica, is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae.

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Baeolidia variabilis is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae found in the Philippines, the Marshall Islands and Papua New Guinea, central Indo-Pacific Ocean.

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Berghia is a genus of sea slugs, aeolid nudibranchs. They are shell-less marine gastropod molluscs in the family Aeolidiidae. They are covered in cerata which give them their unique tentacle look and color. Berghia are commonly found in shallow waters and their diet consists of strictly Aiptasia Anemone. This genus is now commonly used commercially to fight off Anemone populations in fish tanks.

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Berghia coerulescens is a species of sea slug, a marine nudibranch in the family Aeolidiidae. It is the type species of the genus Berghia.

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Berghia norvegica is a species of sea slug, an aeolid nudibranch. It is a shell-less marine gastropod mollusc in the family Aeolidiidae.

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Berghia stephanieae is a species of sea slug, an aeolid nudibranch. It is a marine gastropod mollusc in the family Aeolidiidae. It was previously known as Aeolidiella stephanieae.

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Bulbaeolidia is a genus of marine nudibranch in the family Aeolidiidae.

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Bulbaeolidia alba is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Aeolidiidae.

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Cerberilla is a genus of sea slugs, aeolid nudibranchs, shell-less marine gastropod mollusks in the family Aeolidiidae.

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Cerberilla affinis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae. It was described as a variety by Bergh, 1888 but elevated to species status by Burn, 1966.

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Cerberilla africana is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

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Cerberilla albopunctata is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

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Cerberilla ambonensis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

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Cerberilla annulata is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

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Cerberilla asamusiensis is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Aeolidiidae.

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Spurilla is a genus of sea slugs, aeolid nudibranchs, marine gastropod mollusks in the family Aeolidiidae.

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Spurilla neapolitana, the Neapolitan spurilla, is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Aeolidiidae. It is native to the western Atlantic Ocean, the Caribbean Sea and the Mediterranean Sea. This species was first described as Eolis neapolitana by the Italian naturalist Stefano delle Chiaje in 1841. However, although some authorities quote the year as 1823, the species does not appear in the first volume of delle Chiaje's memoirs, which was published that year. The species was later reassigned to the genus Spurilla.