Cephalopod

Colossal squid

Mesonychoteuthis hamiltoni

PacificAtlanticIndianSouthernArctic A single ocean

Southern Ocean, around Antarctica

Depth

Adults probably below 1,000 m (Southern Ocean)

Size

Up to about 500 kg

Diet

Fish, other squid

Zone

Midnight zone · 1,000 m and deeper

Key facts

• It is the heaviest known invertebrate.
• Its eyes, up to about 27 cm, are the largest in the animal kingdom.
• Its arms and tentacles bear hooks. Those on the tentacles can swivel.
• A juvenile was filmed alive in its habitat for the first time in 2025.

And the sperm whale?

The rarest prey. The fight is tough.

Verified sources

1. Te Papa : Arms and tentacles of the colossal squid
2. NBC : Colossal squid filmed alive for the first time (2025)
3. SeaLifeBase, Mesonychoteuthis hamiltoni

In the game: Prey: +300 points, fight

In the same zone

Bigfin squidMagnapinna sp. Glowing sucker octopusStauroteuthis syrtensis Blind octopusCirrothauma murrayi Giant phantom jellyStygiomedusa gigantea Deepstaria jellyfishDeepstaria enigmatica Firework jellyfishHalitrephes maasi