The plot. Evil land people are destroying the habitat of the noble water people through pollution and fishing. Geesh, The underwater world has power, electricity, machines, clothes, and many more things, I imagine. And all of this stuff must be manufactured. Manufacturing creates waste by-products, also known as waste, garbage, pollution. Now here's my question: Where's their pollution? And more: If they've solved the pollution problem, why not sell it to us instead of going to war? Here's another question: When did totalitarian monarchies become moral political systems? Wasn't that the whole point of the American Revolution--set men free from tyrants. And furthermore, they are living creatures--don't they eat? Where are their bathrooms? How do they process waste? Now the special effects were great, the acting decent, the humor good, but the plot and storyline? Stupid and bizarre. This movie is a celebration of racism, socialism, and environmentalism; and the denigration of individualism, capitalism, and technology. A brainwashed kindergartener could have written the plot. I think maybe that's who did.