Jisho

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裸殻翼足類
Wikipedia definition
1. Sea angelNot to be confused with angel sharks. Sea angels previously known as one kind of pteropod, are a large group of small swimming sea slugs in six different families. These are pelagic marine opisthobranch gastropod molluscs in the clade Gymnosomata within the larger clade Heterobranchia. Sea angels are also sometimes known as "cliones", but this is potentially misleading because the family Clionidae is just one of the families within this clade.
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Read “Sea angel” on DBpedia

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