Showing posts with label barrel jellyfish. Show all posts
Showing posts with label barrel jellyfish. Show all posts

Sunday, 28 July 2019

1.5-metre jellyfish spotted off coast of Cornwall


Divers stayed close to giant animal for an hour before it swam away
Mon 15 Jul 2019 11.58 BSTLast modified on Mon 15 Jul 2019 13.45 BST
A giant barrel jellyfish has been spotted off the coast of Cornwall by divers.
“I’ve never seen one that big,” said Lizzie Daly, a biologist who saw the creature near Falmouth. “We had seen a few smaller jellyfish at a beautiful reef nearby, and then out of the murk came this huge, beautiful jelly fish. You just take a double look and ask yourself if it’s actually a metre and a half long.”
She said swimming alongside the “gentle giant” was “such a serene, grounding experience”.
Thousands of the creatures, the largest jellyfish found in British coastal waters, flock through the Atlantic Ocean towards warm coastal waters in the west of the UK each year and are often found washed up on beaches across May and June.
Owing to the late summer, the animals, which normally measure up to about a metre with their tentacles, were still being spotted in south-west England, south Wales and elsewhere. This was not unusual, Daly said, and the sightings were not part of a “freak jellyfish wash-up”.
Daly and an underwater camera operator, Dan Abbott, were diving in Falmouth as part of the online series Wild Ocean Week and stayed with the abnormally large, translucent bell-mushroom-shaped animal for about an hour before it swam away.
The pair said they were not surprised by the animal’s behaviour. “It has got a very mild sting and poses no threat to humans – some people don’t even feel it,” Daly said. “Many people would be immediately worried, but it is not dangerous. Its a majestic creature.”
However, she said her response may have differed if it was a Portuguese man o’ war, which carries a potentially deadly sting.
Dr Michele Kiernan from the Marine Biological Association in Plymouth said little was known about the lifestyles of barrel jellyfish, including where their young live, and that their movements were at the mercy of winds and currents.

Sunday, 19 April 2015

Jellyfish in the UK: Huge blooms of barrel species found on coast after mini-heatwave


Sunday 19 April 2015

Scores of large jellyfish have been discovered on Britain’s coastline after they have been attracted to warmer conditions brought on by a recent mini-heatwave.

Blooms of barrel jellyfish – that can grow up to the size of a dustbin lid – have been spotted on the south coast after a summer-like climate made a brief appearance.

The species can weigh up to 55lbs (24kgs) and have eight thick “arms”, rather than tentacles, made from frilly-like tissue.

Although the jellyfish, which have no brain or bones, may appear frightening to some, they’re actually harmless to humans as their stings are not strong enough to wound, however it is advised to not touch them.

Sunday, 17 August 2014

Lowly Jellyfish Uses High-Tech Strategy to Find Food

By Elizabeth Palermo, Staff Writer | August 05, 2014 07:02pm ET

The barrel jellyfish, isn't just the largest jelly found in the waters around the United Kingdom, it's also one of the animal kingdom's most strategic searchers, according to a new study.

To locate the best possible meal in the vast waters of its marine habitat, the barrel jellyfish (Rhizostoma octopus) uses a strategy most commonly associated with the world's fastest supercomputers — an approach known as fast simulated annealing.

For mathematicians, fast simulated annealing is an algorithm, implemented by a supercomputer, which can find optimal solutions to complex problems in a relatively short amount of time. For jellyfish, fast simulated annealing is a highly evolved search strategy categorized by a series of predictable movements that bring the jelly closer and closer to large numbers of plankton, its preferred prey. 

Monday, 30 June 2014

Watch the video of a giant barrel jellyfish filmed in Cornwall




Large barrel jellyfish like this one have been seen in great numbers recently off the coasts of Cornwall

A man swimming with his dog in Cornwall captured some amazing footage of a giant barrel jellyfish. On his YouTube commentary Matt Slater said: “This barrel jellyfish (Rhizostoma pullmo) was filmed in the Percuil Estuary, near St Mawes, Cornwall.

“Large numbers of these, the UK's largest jellyfish species have been seen this year around our coast.

“They are totally harmless and feed on plankton. They do have stinging cells but they are not able to get through human skin.

“They can grow to 80cm wide and weigh up to 30 kilos!”

The film gives a perfect example of the size as Matt’s dog Mango swims by.

According to the Torquay Herald Express, sightings were reported to the Marine Conservation Society at Petitor Cove, at Brixham breakwater, Teignmouth, Coryton Cove, Dawlish and in the River Teign off Bishopsteignton. In Torquay harbour there were more than 100.

Read on


Tuesday, 20 May 2014

PICTURES: Huge jellyfish spotted in Cornwall's Helford River

A monster barrel jellyfish has been spotted for the first time floating along - a British river.

The giant creature measuring around 4ft from head to tentacle was seen drifting along Cornwall's Helford River.

Several of the massive creatures have been found washed up on UK beaches in recent weeks but the latest invader was seen half a mile inland.

Barrel jellyfish are usually found in more tropical areas such as the Mediterranean sea.

Saturday, 10 May 2014

Plague of 'giant jellyfish' could reach Devon's shores

By North Devon Journal | Posted: May 08, 2014

A 'plague of giant jellyfish' could arrive on Devon's shores as warm weather is predicted to reach England in May, experts have warned.

A huge barrel jellyfish has already been washed up in Dorset and the creatures have also been spotted off Dawlish yesterday.

The Marine Conservation Society (MCS) says the predicted hot weather could bring an influx.

Richard Harrington from the Marine Conservation Society said: "This predicted hot weather to come, can mean that even more jellyfish are likely to wash up or be in the seas around places like the West Country

"Although this species is harmless their numbers are likely to grow fairly quickly as sea temperatures rise.

"We are very keen to hear from people that find any washed up anywhere around the country.

"This is an Atlantic species and are sometimes found washed up but still advise the public not to touch them."


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