The Colossal Squid (Mesonychoteuthis hamiltoni) also referred to as the Antarctic Squid, is the largest squid species in terms of mass. Not much is known about their behavior as they are rarely seen. The have the largest eyes of any animal, including the whale, and their tentacles are covered with suckers with sharp hooks that help them capture their prey. The Colossal Squid is native to the Antarctic and Southern Ocean and live deep at sea. The diet of the Colossal Squid is made up of small and large fish and other squids. Their conservation status is believed to be of least concern.