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hydroid
Introduction References & Edit History Quick Facts & Related Topics
Images
Green hydra with a smaller hydra budding from its side, both with tentacles extended, against a black background.
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Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
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Lion (panthera leo)
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Mute swan with cygnet. (birds)
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The bearded vulture (Gypaetus barbatus) is seen in Switzerland on December 2024
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hydroid: References & Edit History

Article Contributors

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  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

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Article History

Type Description Contributor Date
Modified link of Web site: Animal Diversity Web - Hydrozoa. Feb 26, 2020
Article revised and updated. May 15, 2019
Replaced photograph. May 15, 2019
Article revised and updated. Nov 13, 2008
Media added. Nov 13, 2008
Media added. Oct 01, 2008
Added new Web site: The Hydrozoa Directory - Siphonophorae. May 13, 2008
Added new Web site: University of California, Berkeley: Museum of Paleontology - Introduction to the Hydrozoa. Jun 27, 2006
Article added to new online database. Jul 20, 1998
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