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Portuguese man-of-war
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Portuguese man-of-war (Physalia physalis) floating at the ocean surface with long, dark tentacles trailing beneath in clear blue water. A Portuguese man-of-war (Physalia physalis) with a translucent, bluish float and trailing tentacles rests on sandy beach near the shoreline. Magnified view of nematocysts, or stinging cells, on a Portuguese man-of-war tentacle, showing oval structures with coiled tubules inside stained in pink and blue. Portuguese man-of-war (Physalia physalis).
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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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Portuguese man-of-war: References & Edit History

Article Contributors

Primary Contributors

  • Michele Metych
  • 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.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: National Center for Biotechnology Information - PubMed Central - Hydrodynamics of sailing of the Portuguese man-of-war Physalia physalis. Sep 26, 2026
Add new Web site: CBS News - FAST FACTS: Portuguese Man-Of-War. Dec 20, 2025
Add new Web site: The Royal Society Publishing - Journal of the Royal Society Interface - Hydrodynamics of sailing of the Portuguese man-of-war Physalia physalis. Feb 12, 2025
Add new Web site: National Center for Biotechnology Information - PubMed Central - Hydrodynamics of sailing of the Portuguese man-of-war Physalia physalis. Dec 17, 2024
Add new Web site: The University of the West Indies - Physalia physalis (Portuguese Man o�War). Mar 29, 2024
Add new Web site: Academia - Massive strandings of pleustonic Portuguese Man-of-War (Physalia physalis) related to ENSO events along the southeastern Pacific Ocean (PDF). Feb 16, 2024
Add new Web site: Frontiers - Frontiers in Marine Science - The Portuguese Man-of-War Has Always Entered the Mediterranean Sea�Strandings, Sightings, and Museum Collections. Jan 05, 2024
Add new Web site: Official Site of the State of New Jersey - Portuguese man-of-war. Nov 17, 2023
Add new Web site: Scientific Reports - Morphology and development of the Portuguese man of war, Physalia physalis. Aug 17, 2023
Add new Web site: A-Z Animals - Man of War Jellyfish. May 08, 2023
Add new Web site: National Center for Biotechnology Information - PubMed Central - Portuguese Man-of-War (Physalia physalis) in the Mediterranean: A permanent invasion or a casual appearance? Mar 31, 2023
Article thoroughly revised. Nov 22, 2022
Add new Web site: South Carolina Department of Natural Resources - Southeastern Regional Taxonomic Center - The Portuguese man-of-war. Oct 06, 2022
Add new Web site: Animal Diversity Web - Portuguese man-of-war. Apr 06, 2020
Add new Web site: National Geographic - Animals - Portuguese Man-of-War. Sep 06, 2016
Article revised and updated. Nov 26, 2008
Added new Web site: How Stuff Works - Animals - Portuguese Man-of-War. May 28, 2008
Added new Web site: National Geographic - Animals - Portuguese Man-of-War. May 26, 2008
Added new Web site: Australian Museum Online - The Bluebottle or Portuguese Man-of-War. May 26, 2008
Added new Web site: The Encyclopedia of New Zealand - Portuguese man-of-war. May 26, 2008
Added new Web site: Think Quest - Blue bottle, Portuguese man-of-war. May 26, 2008
Added new Web site: Enchanted Learning - Portuguese Man-of-War. Mar 07, 2008
Added new Web site: kidz world - Wild Things - Portuguese Man-of-War.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: Hawaiian Lifeguard Association - Portuguese Man-of-War.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: eNature.com - Portuguese Man-of-War.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: Marine Invertebrates of Bermuda - Portuguese Man-of-war.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: Animal Diversity Web - Portuguese man-of-war.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: Driving and Discovering Hawaii - Jellyfish and Portuguese man-of-war Stings.
  • Gaurav Shukla
 Jan 30, 2007
Added new Web site: key-biscayne.com - The Portuguese Man-Of-War. Dec 27, 2006
Added new Web site: The Hawaiian Lifeguard Association - Portuguese Man-of-War.
  • Gaurav Shukla
 Dec 14, 2006
Article revised. Jan 19, 2006
Article added to new online database. Jul 20, 1998
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