Founders' Homeworld

The original and otherwise unnamed Gamma Quadrant planet of Constable Odo's changeling race, the Founders of the Dominion, was an always-dark Class M rogue planet within the Omarion Nebula before its obliteration by a later-ambushed invasion force of secret Cardassian and Romulan ships. Along with the oceans of Great Link shapeshifters it had native flora -- apparently able to grow without photosynthesis or any process related to a home sun. After that incident, a new home was selected in secret.