Skullcrawlers, also known as Cranium Reptant, are giant reptilian-like amphibian daikaiju that serve as the apex predators of Skull Island and the rivals to the Titanus Kong species who ruled the island. Skullcrawlers are large reptilian-like amphibian creatures with only two long forelimbs and no hindlimbs, as well as long, prehensile, serpentine tails. Skullcrawlers are subterranean pack-hunting predators with insatiable appetites that are the results of their heightened metabolisms.