P'hiili were a species of aquatic creatures that were native to the world of Yuuzhan'tar. When the sentient Yuuzhan Vong, also native to Yuuzhan'tar, invaded another galaxy, they took knowledge of the genetic makeup of the p'hiili with them. The aquatic creatures were recreated and placed on the terraformed world of Coruscant after the Yuuzhan Vong captured it in 27 ABY.