Okay, it was Lake Powell, but that's the fish's home!
According to the YouTube vid, this unfortunate young man is an employee of a store called Boater's Outlet who was on a very chill vacation at Lake Powell, Utah, when this nipple chomping incident took place. Everyone involved is doing swimmingly.
Wow, they must have a very friendly employee-employer relationship to be sending this kind of video around! Maybe it's from working with all the boats? Water? Fish in water sucking nipples? It's definitely boat related. Anyway, lesson learned: if you get into a body of water, wear a bra.