you were a scuba diver, usually doing it for fun, not really doing it as a job, more like a hobby.

today you went diving again, standing near the edge of the boat, putting on your equipment and adjusting it, before diving into the water.

after swimming for maybe 20 minutes, you still relatively had half an hour or so left before you'd run out of oxygen, you saw a whale shark, you've seen some before, but after closer inspection, you realized that it was actually a giant mer. Though he was a bit deeper, so probably didn't notice you, you could still clearly see that he was huge, the size of a normal whale shark, but with a top half of it being a black human skeleton.