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Here we have an illustration of a dustbin lid jellyfish, scientific name Rhizostoma pulmo; also know as the barrel jellyfish or the frilly-mouthed jellyfish.
Dustbin lid jellyfish can be found in the northeast Atlantic, the Adriatic, Mediterranean Sea, Black Sea and Sea of Azov. They have floated around in our oceans for over 500 million years with their eight thick arms and soft bodies, which are over 90% water.
Barrel Jellyfish are attracted inshore by plankton blooms which they feed on entirely. They swarm in warmer coastal waters in late Spring and often wash up on beaches in May or June.
Infamous for their stinging tentacles, most species of Jellyfish are harmless to humans. Because Barrel jellyfish only feed on plankton, their sting is too weak to hurt humans However, if you find one dead lying on a beach be careful – they can still sting when dead.
The jellyfish can grow to nearly 3ft in diameter and weigh up to 6st, making it the largest jellyfish in British waters.
Watch this mesmerising 2 minute video of the Rhizostoma pulmo jellyfish, which was found in the west of Scotland during summer and autumn months. This particular jellyfish was photographed in Loch Fyne which is a huge sea loch on the west coast of Scotland.