Line art drawing of portuguese man-of-war. Physalia physalis
Date
Author Pearson Scott Foresman
Source: https://commons.wikimedia.org/wiki/File:Portuguese_man-of-war_(PSF).png

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.