Pyrosomes are hollow, translucent tubes that drift through warm oceans and glow when disturbed. Although each resembles a single gelatinous animal, it is actually a colony of thousands of tiny cloned organisms arranged around a shared central cavity. Each member filters seawater for food before expelling it into the tube, their combined jets slowly propelling the entire colony. Some pyrosomes grow to 18 metres long: thousands of bodies travelling as one illuminated sleeve.
Pyrosomes
