Why they're awesome: The largest animal on Earth is thought to be the blue whale, but these strange ... physalis), resemble jellyfish. Although a siphonophore may look like a single animal ...

The Portuguese man-of-war is a siphonophore, an animal made up of ... Man-of-wars are also known as bluebottles for the purple-blue color of their pneumatophores. The tentacles are the man-of ...