Jellyfish are brainless, boneless, eyeless creatures that are 95% water. Despite this simplicity, however, they’ve withstood ...

It belongs to the Apolemia genus, and like all siphonophores, is made up of a colony of organisms called zooids. Siphonophore zooids are either connected to each other by tissues or encased in the one ...

Often mistaken for a jellyfish, the Portuguese Man o’ War is actually a siphonophore—a colonial organism made up of specialized individuals (called zooids) that function together as one.

“A siphonophore is unusual in that it is comprised of a colony of specialized, genetically identical individuals called zooids — clones — with various forms and functions, all working ...

They belong to the Hydrozoa class and are siphonophores. These creatures are actually colonies made up of genetically identical individuals called zooids, each performing specialized functions. The ...

The Portuguese man-of-war (Physalia physalis), though technically a colonial organism composed of specialized individual animals (zooids) rather than a true jellyfish, demonstrates remarkable prey ...

The big, blue jellyfish washing up on Florida beaches this week actually aren't jellyfish at all. Here's what to know about the Portuguese man o' war.

Each colony consists of thousands of individual zooids—tiny, filter-feeding organisms that work together as a unified entity. The name “pyrosome” comes from the Greek words for “fire body,” referring ...