Perfect timing of waves cresting.
LET ME EXPLAIN WHY THIS IS COOL:
With cameras, like eyes, the more light the better to see something. Less, the less you can see.
Now, to be able to take a photo of something moving fast, you either need to follow it at the same speed and/or have A LOT of light so that nothing ends up blurry.
This photo was taken at—I think—sunset. There is LITTLE light. Meaning HOW THE HECKA HOO WERE YOU ABLE TO TAKE A PERFECTLY DETAILED PHOTO OF A FAST MOVING FORMLESS OBJECT IN DIM LIGHT???