Peracerdon has a dragon-like, narrow head, and whip-like tail (used for balance). Greenish, it has red finlike projections running down its back. It weighs 200kg. Equally at home in calm or thrashing waters, Peracerdon is found all along the perimeter of Skull Island, from the rocky coasts, surf-punished and crumbling reefs to the quiet sedate coastal swamps.
A long snout armed with rows of thin-bladed teeth identifies Peracerdon as a fish-eater, though it readily takes seabirds, eggs, and even unguarded Skull Island Fur Seal pups (if it gets the chance). Powerful claws keep Peracerdon anchored in even the roughest of waves, allowing it to remain steady in pounding surf. It usually remains still, darting its head down to snatch up prey items. Peracerdon can strike quickly with long fore claws, or its gin-trap snout, to snatch prey out of the shoreline pools and along the water’s edge. A long tail balances Peracerdon as it clings in the splash zone, keen eyes piercing the waves to reveal fish and crabs.