Woah, this was very strange. It seemed like such a pleasant thing at first. In fact, I was actually relieved to be able to watch something so nice. It then took a very dark turn and had people being killed and drowned. It's still a great cartoon. It mostly works because the animation is so good throughout the entire thing. There's ton of great visual gags too.
I also love how there's a lot of funny cameos. I saw a bunch of pokemon, Ponyo, and Flounder from "The Little Mermaid". I guess I was hoping for a bit more of a happy ending, but it's still cool. This reminds me of "Giant Shark Vs. Mega Octopus". This cartoon was kind of like that, only actually good.