The Chamra Vortex was a nebula in the Gamma Quadrant, in the Rakhar sector. The vortex has millions of asteroids, ranging from very small to the size of small planets. Toh-maire gas is also present in the Vortex.
Croden hid his daughter, Yareth, in a stasis pod in a large asteroid in the Vortex in 2360s. During his imprisonment on Deep Space 9 for the murder of Ah-Kel, Croden told Odo that there was a Changeling colony in the Vortex.