A diver has been filmed swimming with a group of manta rays in a mesmerising video clip.
William Drumm, 32, from Denver, Colorado, filmed the footage from October to April this year.
The video shows the diver gliding underwater with the manta rays in full view.
William, a photographer and filmmaker, said: “The last two years I have travelled to the Socorro Island, hoping to swim with and film the world’s largest manta rays.