Bissops were non-sentient lizard-hounds used by the sentient Yuuzhan Vong species. Bred by the Yuuzhan Vong to track and hunt living creatures, bissops were carnivorous and had snouts that they used to seek prey. During the Yuuzhan Vong War, bissops were utilized by Yuuzhan Vong warriors to track down both escaping prisoners and enemies who had infiltrated their territory on worlds such as Selvaris and Caluula. Additionally, bissops were used to pull the sled of Supreme Overlord Shimrra Jamaane in 29 ABY, during a ceremony on the planet Yuuzhan'tar.