"Shooting at 24 metres underwater is challenging for a couple reasons. One, it's difficult to handle photo equipment while navigating the depths. Two, my limited oxygen gave me only 20 minutes to set up my camera and lighting. Three, people underestimate how dark it gets underwater. I had to use two 9000 lumen video lights and an ISO speed of 4000 to get this shot! I lit my subject from the back and the left side." Image captured by @bubarabiru.
Shot on the EOS 5D Mark III with the EF8-15mm f/4L FISHEYE USM at 12mm, ISO 4000, f/8.0, 1/160s.