<Tr> <Th_colspan="2"> Binomial name </Th> </Tr> <Tr> <Td_colspan="2"> Physalia physalis (Linnaeus, 1758) </Td> </Tr> <P> 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 . Its venomous tentacles can deliver a painful sting, which can be fatal . Despite its outward appearance, the Portuguese man o' war is not a jellyfish but a siphonophore, which, unlike jellyfish, is not actually a single multicellular organism, but a colonial organism made up of specialized individual animals (of the same species) called zooids or polyps . These polyps are attached to one another and physiologically integrated to the extent that they are unable to survive independently, and therefore have to work together and function like an individual animal . </P> <P> The Indo - Pacific Portuguese man - of - war (P. utriculus), or blue bottle, is a related species with very similar appearance found throughout the Indian and Pacific Oceans . </P>

Difference between jellyfish and portuguese man of war