Hiroya Minakuchi / Portuguese Man of War (Physalia physalis) floating on ocean surface, Portugal

Norbert Wu / Portuguese Man of War (Physalia physalis) a siphonophore colony split into work groups, poisonous, Belize

Norbert Wu / Portuguese Man of War (Physalia physalis) a siphonophore colony split into work groups, poisonous, Belize

Martin Camm / Carwardine / Illustration of Portuguese Man of War / Man o' War / Blue Bubble / Blue Bottle (Physalia physalis), Physaliidae (Wildlife Art Company).