Earth

Planet Earth is a water based planet in the Milky Way. It's dominant species are Humans and Mutants, who often have bitter conflicts. The human race have proved to be extremely intelligent and their fertile land is perfect for animals and plants.
It is extremely overpopulated with assholes.
Also, one resident of this planet can scream so loud he can be heard from space, and his voice travels through dimensions. Said resident is also from a war-wrecked planet, not Earth. Said planet is called Bossitronia.