The Acrastor was a reptilian creature from the planet Bivva. Known for their cunning, stealth, and speed the Acrastor was thought to be the apex predator of Bivva. Solitary hunters, they would usually surprise victims, jumping out from a hidden area and attacking. However they could also chase down their prey and have been recorded to reach speeds of up to 80 kilometers per hour. The average lifespan of an Acrastor was thought to be about 28 standard years.