The Portuguese man o’ war (Physalia physalis), also known as the man-of-war is a marine hydrozoan found in the Atlantic, Indian and Pacific Oceans. Its long tentacles deliver a painful sting, which is venomous and powerful enough to prey on fish Despite its appearance, the Portuguese man o’ war is not a true jellyfish but a siphonophore, which is not an individual multicellular organism (true jellyfishes are single organisms), but a colonial organism made up of many specialized animals of the same species, called zooids or polyps. hese polyps are attached to one another and physiologically integrated, to the extent that they cannot survive independently, creating a symbiotic relationship requiring each polyp to work together and function like an individual animal. It typically feeds on small marine organisms, such as fish and plankton. The organism has few predators of its own; one example is the loggerhead turtle The name “man o’ war” comes from the man-of-war, an 18th-century sailing warship, and the cnidarian’s resemblance to the Portuguese version at full sail. The names for the animal in Hawaiʻian include ʻili maneʻo, palalia, and others. In Australia, South Africa and New Zealand, they are also referred to as Blue Bottles.