Credit to the photographer, Danny Sepkowski. National Geographic provides the following caption:
"The sand sucks up behind a wave while I look in my viewfinder to make sure I get the right composition. Shooting with a 100mm in the shorebreak is not the safest thing to do and is challenging. With a wide angle lens you can place your camera anywhere without looking into the viewfinder. Shooting with a macro lens has taught me patience and composition as well. The detail that this lens has is next level and so are the beatings that I take with it! Traveling and shooting is priceless."
RE: Sand inside a wave