A world record-holding Dorset super-swimmer is the star of a documentary that has just been released.

Human-fish Oly Rush was filmed before, during and after his epic non-stop swim around Grand Cayman – a 37-hour feat of mental and physical endurance. Now the documentary The Grand Swim is available to watch on WaterBear – a free app dubbed the Environmental Netflix.

Oly, from Upton near Poole, said:

“The Grand Cayman swim was my most challenging one by far. It was 95.5km and it took me 36hours and 59 minutes and the documentary crew from Grizzly Productions were there the whole time."

“The swim was to help raise the issue of plastic pollution in our oceans and led me to start my charity Project Planet Earth. This swim engaged a huge community on the island and even created a dialogue with the Cayman government."

“To have the story turned into a film is wonderful, and hopefully it will propel the issue of plastic pollution to a new audience. I spend my spare time cleaning local beaches and I give talks in schools and I am so encouraged by the enthusiasm of the children.”

Oly who has also swum around the Isle of Wight, the length of the Jurassic coast and the island of Ithaca is planning a new swim.