Barrel jellyfish ©marknthomasimages.co.uk
Barrel jellyfish
Scientific name
Rhizostoma pulmoGiants of the jellyfish world, these incredible creatures are the UK’s largest jellyfish! They can grow to the size of dustbin lids – giving them their other common name: dustbin-lid jellyfish.
Species information
Category
Statistics
Bell: Up to 90cm across Weight: Up to 35kgConservation status
Common
When to see
May to OctoberAbout
These large jellyfish swarm in warmer coastal waters in late spring and often wash up on our beaches in May or June, sometimes in their hundreds. Their favourite meal is plankton, which can be found in shallow waters. This is what often causes them to wash up, as they underestimate their size. They have eight frilly arms, which contain their small stinging tentacles and surround hundreds of little mouths! The sting of the barrel jellyfish is not normally harmful to humans, though if you find one on the beach it's best not to handle it as they can still sting when dead.How to identify
A large translucent jellyfish with a huge mushroom shaped bell and a bunch of 8 frilly tentacles below. They don't have marginal tentacles but do have a violet fringe around the bell which contains sense organs. They are often found washed up on beaches in May and June.Distribution
Common off Southern and Western coasts of Britain in summer months.Habitats
Did you know?
Barrel jellyfish are the favourite food of leatherback turtles, the world's largest sea turtle.Watch
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