Genus
Velella
Velella velella. Photo: (c) Rebecca R. Helm. Image by Denis Riek., some rights reserved (CC BY-SA)
Velella is a cosmopolitan genus of free-floating hydrozoans that live on the surface of the open ocean. There is only one known species, Velella velella, in the genus. Velella velella is commonly known by the names sea raft, by-the-wind sailor, purple sail, little sail, or simply Velella.
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