It’s likely the average beach goer would mistake the Portuguese man-of-war for a jellyfish. Not only is it not a jellyfish, it's not even an "it," but a "they." The Portuguese man-of-war is a siphonophore, an animal made up of a colony of organisms working together. So if you spot it or something loooking like a jellyfish be very careful as man-of-war are poisonous and use our icon to let others know where you’ve spotted the man-of- war/ man-o-war so they can also exercise precaution!