Kaminoans are a tall, slender white alien race who live on the planet named Kamino, a planet that had been erased from the Jedi databanks. The Kaminoans live in cities above the waters of their planets. The Kaminoans are expert cloner who had been hired by Sifo-Dyas to build a Clone Army. The Kaminoans used Jango Fett as a basis for the Clones. All Jango Fett asked in return was an unaltered clone of himself, a son which he called Boba Fett.
Their planet was removed from the Jedi libraries but its not revealed as to who actually deleted the information. As Palpatine was masterminding everything behind the scenes, it was probably him.