page_title: Rhizostoma pulmo
hierarchical_section_title: Rhizostoma pulmo
caption_attribution_description: English: A Rhizostoma pulmo jellyfish washed ashore on Bournemouth beach, Dorset.
context_page_description: Rhizostoma pulmo, commonly known as the barrel jellyfish, the dustbin-lid jellyfish or the frilly-mouthed jellyfish, is a scyphomedusa in the family Rhizostomatidae. It is found in the northeast Atlantic, and in the Adriatic, Mediterranean Sea, Black Sea and Sea of Azov. It is also known from the southern Atlantic off the western South African coast and into False Bay.
  It is common in the Irish Sea. It typically is up to 40 cm in diameter, but can exceptionally reach 150 cm or larger, making it the largest jellyfish in British waters. On 13 July 2019, wildlife biologist Lizzie Daly dived off the coast of Cornwall in the United Kingdom, along with the underwater cinematographer Dan Abbott. The two divers shared their encounter with a human-sized barrel jellyfish, Rhizostoma pulmo. The species could typically grow up to one meter and weigh up to 25 kilograms. However, they are not larger than the lion's mane jellyfish.
  It is a favourite food of the leatherback turtle.
  In European populations, barrel jellyfish evoke unpleasant or disgusting feelings but in Asia, they are a source of bioactive compounds used in traditional food and medicine.
context_section_description: Rhizostoma pulmo, commonly known as the barrel jellyfish, the dustbin-lid jellyfish or the frilly-mouthed jellyfish, is a scyphomedusa in the family Rhizostomatidae. It is found in the northeast Atlantic , and in the Adriatic, Mediterranean Sea, Black Sea and Sea of Azov. It is also known from the southern Atlantic off the western South African coast and into False Bay.
  It is common in the Irish Sea. It typically is up to 40 cm (16 in) in diameter, but can exceptionally reach 150 cm (59 in) or larger, making it the largest jellyfish in British waters (Cyanea capillata reaches an even larger size, but is generally smaller in Britain). On 13 July 2019, wildlife biologist Lizzie Daly dived off the coast of Cornwall in the United Kingdom, along with the underwater cinematographer Dan Abbott. The two divers shared their encounter with a human-sized barrel jellyfish, Rhizostoma pulmo. The species could typically grow up to one meter (3.2 feet) and weigh up to 25 kilograms (55 lbs). However, they are not larger than the lion's mane jellyfish.
  It is a favourite food of the leatherback turtle.
  In European populations, barrel jellyfish evoke unpleasant or disgusting feelings but in Asia, they are a source of bioactive compounds used in traditional food and medicine. One study indicates that washing in aqueous solutions and the separation of high molecular weight proteins from the extract, e.g., by membrane filtration, could be a way to remove possible toxic compounds from jellyfish extracts and to concentrate potentially bioactive soluble compounds.The potentially active soluble components may have uses as nutraceutical and cosmeceutical ingredients.
caption: Rhizostoma pulmo washed ashore at Bournemouth in southern England
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