Often mistaken as a jellyfish, a Portuguese man o' war is a species of siphonophore and comprises a colony of single-celled organisms that float on the ocean's surface. Lacking a brain, it has ...

curid=67414037. via Wikimedia Commons Often mistaken for a jellyfish, the Portuguese Man O’ War is actually a siphonophore, a colonial organism composed of specialized individual polyps. Encounters ...

Although commonly referred to as a jellyfish by the general public, it is actually a siphonophore - a floating colony of polyps that work together and move, driven by wind and ocean currents.

This siphonophore—a collection of single cells that teamed up to form a larger creature—was spotted in shallower water near Mocha Island (a small island off the coast of Chile) while ...