Portuguese man o' war

Portuguese man o' war
Scientific classification
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Hydrozoa
Order:	Siphonophora
Family:	Physaliidae
Binomial name
Physalia physalis (Linnaeus, 1758)

The Portuguese man o' war (Physalia physalis) is a Cnidarian invertebrate. It lives in the sea. It is sometimes called the blue bubble, or man-of-war. Its common name comes from a Portuguese war ship of the 15th and 16th century. The ship had triangular sails, similar in shape to the bladder of the man o' war.

The Portuguese Man o' War has a reputation for swarming in groups of thousands. It is also known for its powerful sting.