For ages I struggled to come up with an original creature idea that I might want to make in Spore... then it came to me.
I Give you... the ViS:

If theres one phrase that explains the ViS it would be KISS. Keep It Simple Stupid! The ViS evolved on a planet with incredibly scarse resources and as such developed into a very thrifty civilisation.
What you see above is not the natural form the ViS once had, but the result of the cultural phenomenon reffered to as the Great Simplification.
For centuries the ViS had viewed themselves with discomfort. The process of evolution by natural selection had given them forms (which i havent come up with yet, stay tuned) which were overcomplicated and rather inefficient. This idea would have revolted the ViS if they had been capable of such strong emotions. So when they discovered the science of genetics and Biotechnology they seized the chance.
Mapping their genome they set about it with a grim purpose. Unnecessary genes were eliminated, new code was written from scratch, countless mistakes and failed experiments were liquidated and reconstituted into the next generation of simplified ViS lifeform.
Eventually, 200 years after they had begun, the ViS scientists achieved their goal: The super-simple, super-efficient ViS seen above.