VIDEO: Stinging jellyfish swarm spotted in Torbay waters

A South Devon marine expert has issued a public warning after an unusual rise in jellyfish numbers was recorded along the coast — including several species known to sting.

Chris Thomas, co-founder of the Cove Discovery Project in Brixham, said the recent surge includes a range of species not normally seen together in such numbers. 

“We often see an increase in maybe one type of jellyfish,” he explained, “but this year we’ve recorded a rise in multiple types — including Moon Jellies, Compass and Blues.”

The Compass and Moon jellyfish were spotted in the sea off Brixham within the last few days — part of a wider bloom believed to be linked to changing conditions in local waters. Some of the species are typically found in warmer regions, like the Mediterranean and Atlantic.

The appearance of stinging species such as Compass jellyfish has prompted a safety warning to swimmers and beachgoers. While the stings are not considered dangerous, they can be painful and unpleasant — especially for children.

“As a rule of thumb, the more colourful they are, the more likely they are to have stinging tentacles,” Mr Thomas said. “If you're concerned, it’s best to avoid contact and get out of the water.”

He added that while the sightings are “very exciting” for wildlife enthusiasts, the scale and mix of species may also reflect deeper changes in the marine environment.

“There is a clear shift in the movement of marine wildlife,” he said. “This bloom follows the recent increase in sightings of octopus and tuna, and we’re hearing of more cetaceans being spotted as well.”

Mr Thomas said the increase in jellyfish may be caused by several factors, including rising sea temperatures, reduced prey species, increased plankton, and wider natural environmental cycles.

“These blooms don’t tend to last too long,” he added. “We would expect a significant reduction in numbers over the coming days or weeks.”

Members of the public are advised to report unusual sightings to local marine groups and follow standard guidance on what to do if stung.

Photo and video credit: Chris Thomas The Cove Discovery Project, Brixham.