I just saw it today and I liked it, but can someone explain why they thought it was a good idea to cross the little mermaid with the bible?
The way I understood it is as follows: Fish daughter of Poseidon wannabe meets human boy, likes boy, uses powers to become human. Father does not want daughter to become human because they are evil and pollute the world, father locks up daughter but she breaks free thanks to her hundreds of fish sisters. During the escape she causes the planet to flood, killing probably 80-90% of the world's population. Humanoid fish girl has zany adventures with boy, learns about life as a human, we learn that Fish girl's Goddess mother doesn't give a sh*t about humanity and proceeds to let the rest of the non-water based lifeforms suffer so that her daughter can have said zany adventures. Goddess finally gets bored and forces daughter to make a choice in order to put the world back to "normal". Daughter chooses to be a human, losing her world-killing powers in the process, everyone cheers, happy ending, entire plant still submerged under water, bitch Goddess still does nothing to fix it and swims off. Now-human daughter dies three days later because she forgot she can't breath underwater anymore.