The Betrushians were tall and thin humanoids. They were covered in greyish green scales and had crests along their cheeks and on their head. They had large blue or yellow eyes with slitted pupils. Their fingers and toes had sharp claws and they had small pearly teeth. They had rows of bony groves parallel to their spines. Betrushians produced milky white sweat when agitated. They reproduce using leathery, brown eggs, which needed to be kept warm to survive. They had purple hearts and dark, thick blood. Some Betrushians were described as having grey hair.