Hooks on Colossal Squid Arms Are Unique Among Known Squid Species

Colossal squid do not just have suckers on their arms, they have serrated hooks rarely seen in other squid.

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Some hook scars found on fish match the rotational design observed in preserved colossal squid specimens.

Mesonychoteuthis hamiltoni features swiveling, sharp hooks on both its tentacles and arms, a distinguishing trait that separates it from many other large squid species.

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These hooks increase grip strength when capturing large, muscular prey in cold Antarctic waters. Unlike simple suction cups, the hooks can physically pierce and anchor into tissue.

This anatomical specialization supports the theory that colossal squid evolved specifically to subdue large fish rather than small crustaceans, shaping their ecological niche in the Southern Ocean.

Source

Journal of Zoology

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