#TIL: https://en.wikipedia.org/wiki/Siphonophorae and https://en.wikipedia.org/wiki/Planaria

"Although a siphonophore may appear to be a single organism, each specimen is in fact a colonial organism composed of small individual animals called zooids that have their own special function for survival. Most colonies are long, thin, transparent floaters living in the pelagic zone. Some siphonophores, such as the venomous Portuguese man o' war and the Indo-Pacific man o' war, superficially resemble jellyfish."

And

"Planaria is a genus of planarians in the family Planariidae. It is currently represented by a single species, Planaria torva,[1] which is found in Europe.[2] When an individual is cut into pieces, each piece has the ability to regenerate into a fully formed individual.[3]"