Make a choice between swimming in the ocean or taking a dip in the pool. And by the ocean, we mean swimming kilometers off the shore, in the middle of the night. We bet that image caused your heart to race. Can you imagine springing to the surface almost instinctively, desperate to paddle against the ocean water? Well, that’s what we would feel if we had encountered any of these things you are about to see too. These photos portray some of the most terrifying things found underwater. People either encountered them while snorkeling, diving or flying over the ocean. Some Reddit users have a term for it called, submechanophobia, which stands for the full or partial fear of submerged man-made objects. Because after all, you expect to only encounter marine life when you’re enjoying the ocean. But hey, what’s a dragon, a giant, or even Jason Voorhees doing there?