Inostrancevia is a large (11 foot long, 3 foot tall, 700-pound) gorgonopsid. Like all gorgonopsids, it has a head like that of a dinosaur's and an otherwise somewhat mammal-like body. Their tails are fairly short and their reptilian legs are held underneath their body, allowing them to sprint. Inostrancevia can bite very powerfully, and with its 5-inch long saber teeth it is made to deal massive damage to well-armed prey. They are aggressive when provoked.