"Long ago, a few million years before humanity rose to the stars, only two intelligent life forms ruled the spiral encompassing the Sol system. One of them were the R'ull. The R'ull despised all other sentient beings, so it is no surprise when the R'ull wiped out the other race, genetically modifying their bodies to be basically moving pond scum, still remembering their former lives.
After a few generations, when the pond scum lost all sentience, something marvelous began to happen. Each proceeding generation became specialized to do singular simple tasks, as well as group together and meld with other of the floating beings, with some pulling oxygen from the air, while another slowly padded along.
Eventually, this planet was slowly covered in the hyperspecialized organisms, working together in semi-humanoid columns. Today, these are known as the Bunchers, the lowest of every society in the three galaxies."
- The Encyclopediac