Concavenator was a medium-sized (roughly 6 meters (20 feet) long) primitive carcharodontosaurian dinosaur possessing several unique features. Two extremely tall vertebrae in front of the hips formed a tall but narrow and pointed crest on the dinosaur's back. On the island, they are medium sized hunters that have been seen in the mountainous and the north sides of the island. They are seen preying on smaller or same-sized animals as themselves. So far, there are 2 characters that have been from the genus Concavenator.