Shraak Sep was a gas dwarf, and is the seventh planet orbiting Shraak Untal. It once had a huge atmosphere of helium and hydrogen gas, however one day it suddenly lost a huge amount of its hydrogen atmosphere and massively increased in reflectivity.

Initial attempts to send probes there, beginning with Repetare Un, were unsuccessful; all attempts at close photography and other sensing of Shraak Sep were ill-fated. 58 years after the event in which Shraak Sep's atmosphere vanished, the reflectivity of the world decreased rapidly, until it became that expected of a large, rocky planet in the outer solar system.

Subsequent attempts to observe Shraak Sep have returned no unusual properties about it whatsoever; the cause of its unusual properties and atmospheric disappearance are as yet unknown to the Waterbe.