Note to self: don't jump overboard, it wasn't a mermaid it's a shark.
Dropping A GoPro Under A Cruise Ship To See The Sea Life Below

Because it’s allegedly better down where it’s wetter according to Sebastian (I don’t trust him), this is a video from a GoPro that was lowered beneath a cruise ship both during the day and night to see the different sea life that was present there. Unsurprisingly, it’s the same sea life you would expect to see not under a cruise ship. So, if you were wondering if the oceans have evolved freaky-deaky sea life suited specifically for life under a floating city, the answer is not yet, but probably soon.