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Wikipedia definition
1. VelellaVelella is a genus of free-floating hydrozoans that live on the surface of the open ocean. They occur worldwide, and are commonly known by the names by-the-wind sailor, purple sail, little sail, or simply Velella. The commonest species is Velella velella; it is not clear whether there is more than one species. These small cnidarians are part of a specialised ocean surface community that includes the cnidarian siphonophore known as the Portuguese Man o' War.
Read “Velella” on English Wikipedia
Read “カツオノカンムリ” on Japanese Wikipedia
Read “Velella” on DBpedia

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