Photographer Patrick Coyne has captured incredible footage of dolphins swimming in bioluminescent waters.
The ethereal scene, which could easily be mistaken for something out of a science-fiction movie, was filmed recently in the ocean off California's Newport beach.
Coyne, who had previously seen glowing dolphins on a Netflix documentary, had been keen to capture the phenomenon for himself and had spent hours searching after dark for a sign of the animals.
"We were out for a few hours and on our final stretch back we finally had 2 Dolphins pop up to start the incredible glowing show," he wrote on Instagram.
"A few minutes later and we were greeted by a few more which was insane. I'm honestly still processing this all..."
Despite appearances, it is not actually the dolphins themselves that are glowing - instead they are swimming through concentrations of microscopic bioluminescent organisms called dinoflagellates.
When disturbed, each cell emits a flash of light lasting mere milliseconds.
When a pod of dolphins swims through a large number of them, it can produce quite the light show.
You can check out the footage Coyne captured below.