Powerful sperm whales or cherethrynd (S. "Hallmaw"; sing. "Charothrond") resided in the deep waters of the Belegaer, off the western coasts of Middle-earth. Unlike most whales, they sported teeth—nine inch long teeth — and they hunted fish and squid rather than consuming krill through a baleen strainer. The charothrond's favorite food and most dangerous rival was the Giant Squid.