colossal squid, (Mesonychoteuthis hamiltoni), a massive, elusive cephalopod species inhabiting cold, deep regions of the Southern Ocean at depths ranging from 20 to 2,000 meters (66 to 6,562 feet). Biologists consider the colossal squid either the largest or second largest invertebrate in the world, both titles being shared jointly with the giant squid (Architeuthis). The species is also known for having the largest eyes of any animal in the world. The colossal squid’s geographic range is circumpolar, and it is found mainly south of the Antarctic Convergence, although some individuals may venture as far north as the colder waters near ...(100 of 661 words) Access the full article Help support true facts by becoming a member. Subscribe today!