I highly doubt he would be on a beach naked when he knows the paps will catch him. Plus his legs and crotch area are dry and his stomach and up is wet so this is most likely Photoshop.
I knew it was real, at least above the waist. This reminds me of the Zac Efron naked beach photo where they photoshopped his crotch out, but that at least looked fake. This doesn't.
But I remember when I first saw this. It was when he was dragging Sandra or it was when Rihanna was dragging her. good times. The Navy and TB were going crazy when Sandra posted this.