Jet Propulsion Enables Sudden Acceleration in Colossal Squid

When threatened or attacking, the colossal squid can propel itself backward with explosive force.

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Jet propulsion is also used by octopuses and cuttlefish, though typically on a smaller scale.

Like other cephalopods, Mesonychoteuthis hamiltoni uses jet propulsion by expelling water through a siphon, generating rapid bursts of movement despite its massive size.

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Although not built for sustained speed, this mechanism allows quick repositioning during ambush or escape scenarios in the dark bathypelagic zone.

The reliance on burst acceleration rather than endurance reflects energy-conservation strategies common among deep-sea giants.

Source

Smithsonian Ocean Portal

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