From ROI Wiki

The Buyyor are a semi-anthropomorphic mammalian race very similar in appearance to a Minotar. They live on massive Worldships that wander the galaxy, and serve as their homeworlds on which they live. The Buyyor chose to live in massive starships instead of on a planet of their own when they couldn't find a new planet to call home after their original homeworld was destroyed.

Known Buyyor