Search for class Hydrozoa returned 6,137 results.

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Species (4,503)
Unranked (777)
Genus (627)
Family (161)
Subspecies (45)

Form (11)
Order (7)
Variety (6)

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genus: Sibogita Maas, 1905

Kingdom: Animalia
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genus: Ctenaria Haeckel, 1879

Kingdom: Animalia
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genus: Hydrodendron Hincks, 1874

Kingdom: Animalia
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- Occurrences: 13
genus: Turritopsis McCrady, 1857

Kingdom: Animalia
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genus: Octorathkea Uchida, 1927

Kingdom: Animalia
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genus: Ectopleura L.Agassiz, 1862

Kingdom: Animalia
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- Occurrences: 179
genus: Halicornaria Bale, 1884

Kingdom: Animalia
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genus: Plumalecium Antsulevich, 1982

Kingdom: Animalia
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genus: Clathrozoon Spencer, 1891

Kingdom: Animalia
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genus: Calycopsis Fewkes, 1882

Kingdom: Animalia
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