Is the Alicella gigantea really the world's largest amphipod?

Yes, the Alicella gigantea is recognized as the world's largest amphipod, capable of reaching lengths up to 34 centimeters (13.4 inches).

Where was the Alicella gigantea historically thought to live?

Historically, scientists believed the Alicella gigantea was rare and sparsely distributed in isolated pockets of the deep sea.

What new research was published on Alicella gigantea?

New research published in Royal Society Open Science indicates Alicella gigantea inhabits nearly 59 percent of the world's ocean floor, challenging previous assumptions.

Home / Science / Deep Sea Surprise: 'Supergiant' Amphipod Not Rare

Deep Sea Surprise: 'Supergiant' Amphipod Not Rare

28 Dec

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Summary

Giant amphipod inhabits nearly 59 percent of the world's ocean floor.
Populations show very low genetic differentiation globally.
New research challenges assumptions about deep-sea species scarcity.

Deep Sea Surprise: 'Supergiant' Amphipod Not Rare

The deep-sea Alicella gigantea, once thought to be a rare inhabitant of the abyss, is now understood to be widespread. Scientists have discovered this giant crustacean, which can grow up to 34 centimeters, populates nearly 59 percent of the global ocean floor. This comprehensive finding stems from recent genetic and expeditionary research that compiled extensive records and analyzed DNA sequences.

Previous assumptions of scarcity were based on infrequent sightings and limited samples. However, modern deep-sea sampling techniques and detailed genetic analyses conducted by researchers at the University of Western Australia have revealed extensive populations. These studies indicate that A. gigantea thrives in the abyssal and hadal zones of the Pacific, Atlantic, and Indian Oceans.

Remarkably, very low genetic differentiation was observed among populations worldwide. This suggests a single, highly dispersed species, a testament to its evolutionary stability and adaptation to extreme environments. As interest in deep-sea exploration grows, understanding the abundance and genetic dynamics of species like A. gigantea is crucial for biodiversity assessments and conservation efforts.