Amazing footage from the Blue planet series, the Portuguese man o' war, also known as the man-of-war, bluebottle, or floating terror.
It’s often referred to as a jellyfish. However, it’s not actually 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.
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