Antarctic Food Webs Depend on Colossal Squid as Apex Invertebrate Predators

In the freezing Southern Ocean, the colossal squid sits near the top of the invertebrate food chain.

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🤯 Did You Know (click to read)

Stable isotope studies of squid tissue help scientists map its precise position within Antarctic food chains.

Mesonychoteuthis hamiltoni preys on large fish species such as Antarctic toothfish and likely competes with top predators like sperm whales. Its size, strength, and specialized hooks allow it to dominate mid-to-deep water ecological zones.

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💥 Impact (click to read)

Because it occupies such a high trophic level, the colossal squid influences population dynamics across multiple species. Predatory pressure helps regulate fish stocks in Antarctic waters, indirectly shaping the broader marine ecosystem.

Understanding its ecological role is crucial for conservation planning, particularly as commercial fishing expands into Southern Ocean territories where food web balance remains fragile.

Source

Frontiers in Marine Science

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