Dustbin-Lid Jelly

Rhizostoma octopus

Rhizostoma octopus is a species of jellyfish that can be recognized by its distinctive shape, resembling a dustbin lid. This jellyfish typically inhabits the English Channel, North Sea, and North Atlantic, extending up to the Norwegian Sea. It is usually found in pelagic environments at depths ranging from 10 to 20 meters, although occurrences have been recorded at depths shallower than 40 meters. The species can reach a maximum length of up to 90 cm, making it one of the larger jellyfish in its family. This jellyfish primarily feeds on zooplankton and small invertebrates, filtering food particles from the water as it drifts. Predators of Rhizostoma octopus include leatherback sea turtles, which are known to consume these jellyfish. The reproductive habits of this species involve spawning, although specific details about its life cycle and fecundity are not extensively documented. Diving encounters with the Dustbin-lid Jelly can be intriguing, as they often drift gracefully in the water column. Divers may observe them floating or pulsating gently, providing a unique opportunity for underwater photography. As this species is harmless to humans, divers can enjoy close encounters without concern. While the conservation status of Rhizostoma octopus has not been evaluated by the IUCN, it is harvested for collagen, highlighting its economic importance in some regions.