Author Alfred G. Mayer (1868–1922)
English: Portuguese Man-of-War
Subject: Jellyfishes, Portuguese man-of-war
Tag: Invertebrates
Date 1905
Source/Photographer
English: Alfred Goldsborough Mayer (1906) Sea-Shore Life : the Invertebrates of the New York Coast and the Adjacent Coast Region, New York City, NY: A. S. Barnes & Company
Source: https://commons.wikimedia.org/wiki/File:FMIB_38489_Portuguese_Man-of-War.jpeg

The Atlantic Portuguese man o' war (Physalia physalis), also known as the man-of-war, blue bottle, or floating terror, is a marine hydrozoan of the family Physaliidae found in the Atlantic Ocean, as well as the Indian and Pacific Oceans.