Olympic gold medallist Rebecca Adlington and actor James Norton have taken part in a sea swimming endurance challenge in Kent.
Both were participants in a 10-hour relay at Joss Bay in Broadstairs on Friday in aid of the Blue Marine Foundation conservation charity.
Adlington, who won her medals swimming freestyle, said she "always felt a deep connection to water" so supporting coastal restoration "just felt like a natural fit".
The event sponsor said it would donate £150 to for every kilometre participants swam at the event to the charity.
According to organisers, 36 swimmers swam a total of 29.4km.
Adlington added: "I hope people see this event as more than just a challenge, it's a call to action."
The UK has seen a 92% reduction in seagrass meadows and a 95% decline in native oyster reefs over the last century, according to a report published by Blue Marine Foundation in 2024.
Happy Valley actor Norton said his family goes by the mantra "you'll never regret a swim" but admitted he had never been involved with this level of endurance swimming.
"Like everyone, I'm in awe of the ocean. It's wild, powerful, and under threat," he said.
"Taking a stand is about protecting biodiversity and ensuring future generations can experience the magic of healthy seas."
