Jenny Adler is a marine-biologist-turned-photographer who explores the labyrinthine aquifer that lies beneath most of Florida. We talked to Adler about her work, her inspirations, and what it’s like to dive in underwater caves. Then, we challenged her to create the most otherworldly photos she could, using the new Canon EOS 6D Mark II DSLR.

Armed with strobes, lights, and the camera encased in an underwater housing, Adler shot for two days, cave-diving in the Devil’s Cave System and free-diving in a duckweed-covered sinkhole in north Florida. Scroll down for a glimpse into the world she captured below:

We couldn’t help but ask Adler to explain how she captured such surreal, striking shots. “The fast focus was essential in places where I have a limited window of time to get the shot, whether it’s holding my breath while freediving or carrying the air I need to breathe while cave diving,” she said. “For my underwater shoots, the EOS 6D Mark II paired with the Canon 8-15mm f/2.8 fisheye lens produced sharp, in-focus images.”

The low-light capabilities of the camera proved useful in the dark environment as well. “We have to carry in all of our lights to illuminate large, pitch dark caves, so the ability to increase the ISO and still produce low-noise images was helpful,” Adler said. “It’s definitely a win in my book.”

Angela Wang is a Senior Writer for Studio@Gizmodo.

This post is a sponsored collaboration between Canon and Studio@Gizmodo.