File:Physalia physalis (Linnaeus, 1758) - Portuguese man-of-war stranded on aragonite sand beach - San Salvador Island, Bahamas.jpg

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Physalia physalis (Linnaeus, 1758) - Portuguese man-of-war stranded on aragonite sand beach.

This organism is not a jellyfish, despite the superficial similarity. True jellyfish are members of Class Scyphozoa (Phylum Cnidaria), whereas the Portuguese man-of-war is in Class Hydrozoa (Phylum Cnidaria). This organism is a colony of hydrozoans. The body is bluish or purplish or pinkish and consists of a gas-filled float plus many long tentacles. The tentacles have numerous nematocysts (stinging cells), used for paralyzing or killing prey.

Classification: Animalia, Cnidaria, Hydrozoa, Siphonophora, Physaliidae

Locality: shoreilne immediately south of The Thumb, eastern margin of San Salvador Island, eastern Bahamas
Date
Source Physalia phyalis (Portuguese man-of-war) (San Salvador Island, Bahamas) 1
Author James St. John

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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/16082657072. It was reviewed on 6 April 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

6 April 2015

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current19:59, 6 April 2015Thumbnail for version as of 19:59, 6 April 20153,404 × 2,568 (2.92 MB)Jacopo Werther (talk | contribs){{Information |Description=Physalia phyalis (Linnaeus, 1758) - Portuguese man-of-war stranded on aragonite sand beach. This organism is not a jellyfish, despite the superficial similarity. True jellyfish are members of Class Scyphozoa (Phylum Cnidari...

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