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Temporal range: 575–0 Ma
Haeckel Siphonophorae 7.jpg
Scientific classification e
Kinrick: Animalia
Phylum: Cnidaria
Subphylum: Medusozoa
Cless: Hydrozoa
Owen, 1843
Subclasses and orders[1]

Hydrozoa (hydrozoans, frae auncient Greek ὕδρα, hydra, "sea serpent" an ζῷον, zoon, "animal") are a taxonomic class o indiveedually very smaa, predatory ainimals, some solitary an some colonial, maist livin in saut watter.

References[eedit | eedit soorce]