The Kerakin are an integrated race of the Kerakin, Tegor, Pak, and Slavor, but the Krynn are not included in that. The Kerakin are basically human, and mostly concerned with survival any way they can make it. The Krynn are more technologically advanced, cold, and care little for anything but their own agenda. The Krynn are basically human also, yet smaller and more slender with a slight bluish tint to their skin. They are also reported to have some slight telepathic abilities.
The thermal exhaust port of your Death Star™ plays a critical role in the dissipation of excess waste heat produced by the Death Star's energy reactors. Under no circumstances is the thermal exhaust port to be covered, obstructed or modified in any way.