Aquatica is a large world that is mostly water and little land. The regions vary from sub-arctic to super-tropical, creating strong seasonal variations. Mage Wars and extra-planar invasions caused many unusual problems on this world. Everything from the weather, dimensional shift areas, mutations, and a variety of other ills.
It all started when a group of extra-planar races discovered Aquatica, she was a primitive world at this time, with rich deposits of many natural resources. The two races in charge soon began to disagree on how to treat the slave labor. [The slaves were the ancestors of the human, that had been artificially evolved by magic and bio-organic technology]. The Atlanteans and Astral Elves disagreements were on many things, including: whether magic or psionics was better; the experimentation, evolution and treatment of subjugated races; among other things.