These marine animals, which are often referred to as devil rays because their heads have two horn-like points, can soar through the air for up to a few seconds at a time before belly-flopping back to their watery home.

Why they do it, however, is a complete mystery. Scientists propose that it could be a mating ritual, a way to feed, or just a fun activity, but no one is certain, yet.

Octavio Aburto, an assistant professor at the Scripps Institution of Oceanography, came upon a giant swarm of thousands of these flying devil fish near the Gulf of California in 2011. Most of the mind-blowing photos you'll see here were taken during that encounter by Aburto with the International League of Conservation Photographers.

This article was originally published by Business Insider.

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