Rhizostoma pulmo

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Rhizostoma pulmo
Barrel jellyfish (Rhizostoma pulmo) (25515589773).jpg
Rhizostoma pulmo
Scientific classification edit
Kingdom: Animalia
Phylum: Cnidaria
Class: Scyphozoa
Order: Rhizostomeae
Family: Rhizostomatidae
Genus: Rhizostoma
R. pulmo
Binomial name
Rhizostoma pulmo
Macri, 1778

Rhizostoma pulmo, commonly known as the barrel jellyfish,[1] the dustbin-lid jellyfish or the frilly-mouthed jellyfish, is a scyphomedusa in the family Rhizostomatidae.[2] 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.[3]

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 [4][5], 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.[6] 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.[7]

It is a favourite food of the leatherback turtle.[8]

Rhizostoma pulmo washed ashore at Bournemouth in southern England
Orifice of a barrell jellyfish


  1. ^ Aquarium of Genoa – species description: Rhizostoma pulmo. Retrieved 31 May 2013.
  2. ^ "Dustbin-lid jellyfish - Rhizostoma pulmo". MarLIN. Retrieved 16 September 2011.
  3. ^ Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. Two Oceans: a guide to the marine life of southern Africa ISBN 978-1-77007-772-0
  4. ^ https://www.sealifebase.ca/summary/Rhizostoma-pulmo.html
  5. ^ https://www.livescience.com/65946-human-size-jellyfish-found-in-uk.html
  6. ^ "Divers 'humbled' by giant jellyfish encounter". July 17, 2019 – via www.bbc.co.uk.
  7. ^ "Humans Who Swam Along a Human-Sized Jellyfish". Mirror Herald. Retrieved 17 July 2019.
  8. ^ "COAST : Community of Arran Seabed Trust - Barrel Jellyfish". www.arrancoast.com. Retrieved 29 May 2018.

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