Am I the only person who wasn't aware of this?
The Portuguese Man O' War (Physalia physalis), also known as the blue bubble, blue bottle, man-of-war, or the Portuguese man of war, is commonly but erroneously thought of as a jellyfish; in fact, it is not a single animal, but rather a siphonophore – a colony of four kinds of highly modified individuals, specialized polyps and medusoids[1].
http://en.wikipedia.org/wiki/Portuguese_Man_o%27_War
