In the Star Wars movie saga, the fictional planet Naboo serves as the home of Queen Amidala. It's an idyllic world populated by peaceful humans and a species of intelligent amphibians, the Gungans.
"We have rather few examples of two or more intelligent species simultaneously sharing a planet, but it has happened. The Neanderthals coexisted with Homo sapiens for millennia," said Seth Shostak, a real-life astronomer with the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, California. "So maybe it's possible to share, as long as neither species has the technology to obliterate, enslave, or merely cook and eat each other."