The colossal squid, native to Antarctic waters, is known for its immense size, reaching up to 14 meters. It possesses large eyes, the largest in the animal kingdom, and hooks on its tentacles. It inhabits deep oceanic environments and preys on large fish, demonstrating remarkable predatory skills.

Mesonychoteuthis hamiltoni, commonly known as the colossal squid, is native to the Southern Ocean. This region encompasses the waters surrounding Antarctica and extends northward to the sub-Antarctic islands. The species has been reported in various locations within this zone, including the Ross Sea and the waters around South Georgia Island.

The colossal squid inhabits the deep ocean, typically residing at depths ranging from 1,000 to 2,200 meters (3,280 to 7,218 feet). The environmental conditions in these depths are characterized by cold temperatures, often near freezing, and high pressure. The water is dark, as sunlight does not penetrate to these depths.

Mesonychoteuthis hamiltoni occupies a niche as a top predator in the deep-sea ecosystem. It preys on large fish and other squid species, using its formidable beak and hooked tentacles. The species is adapted to its deep-sea environment with features like large eyes for detecting prey in low light conditions and a robust body to withstand high pressure.