Hundreds of people broke the world record on Thursday for the largest-ever gathering of mermaids.
Some 388 ' merfolk ' including men, women and children took part in the 2022 Mermaid Challenge in Plymouth, Devon.
It beats the previous Guinness World Record for a single meeting of mermaids and mermen which was recorded at 300.
Those taking part could be shirtless, wear a swimming shirt, bikini top, swim costume top or a clamshell bra.
The lower half of their body had to resemble that of a fish with a flare of material covering their feet.
Organiser Pauline Barker said there had been a "fabulous turn out" in the sunshine as the Queen's Jubilee celebrations began.
Speaking to her fishlike friends on Facebook, she said: "Wowzers you were all absolutely fabulous and 'mermazing.'
"Thank you for coming and playing this morning. We had 388 on the count and needed 301 for the record so we have to wait for Guinness adjudication before making it official."
Participants did not hold back with their costumes when making their attempt to steal the record in 2022.
Pictures show hundreds merfolk sat around the lido dressed in brightly coloured wigs, neon tops and glitzy tails.
A spokesman for the event said unofficially they have broken the record but they need confirmation from Guinness next week.
Guinness defines a merperson as a "mythological creature which has the top half of their body being that of a human and the bottom half a tail of a fish," which means there are a few requirements for the costumes.
All participants had to wear a fishtail costume skirt that is close-fitting from the waist to the ankles and with a flume or flare of material extending over and covering the feet.
The Mermaid Challenge was held at Tinside Lido in Plymouth on Bank Holiday Thursday, June 2.
While most of Brits were dressing up in their best royal attire to celebrate the first day of the Queen's Jubilee celebrations, the 'merfolk' were putting on their fins and hitting the pool.
The 600-ticket event sold out online and kicked off at 8am. Participants were each awarded a 'certificate of participation' via the mermaid challenge website.
A similar trend to emerge in recent years is mermaiding, which combines fantasy and magic with an intense swim workout
The new sport has swept the UK with devoted fans revealing why they cannot resist the call of the sea.
Swimmers wear specially adapted monofins covered with thin fabric tails.
This means they can glide through the water with all the grace of Ariel from The Little Mermaid, with both legs working as one.
