‘Death Pool’ in the Deep Sea Discovered, ‘Immediately’ Kills Everything That Enters

By: Georgia | Published: Sep 02, 2024

Researchers from the University of Miami exploring the depths of the Red Sea have identified highly saline and oxygen-deprived areas on the seafloor, termed “death pools,” where marine life is instantly killed upon entry. 

These zones, while deadly, are paradoxically bustling with microbial life, which thrives in these extreme conditions.

The Paradox of Life in Deadly Waters

The existence of life in these harsh conditions of the death pools suggests important clues about the earliest life forms on our planet. 

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An underwater remotely operated vehicle hovering over a brine pool on the seafloor, used for scientific research and exploration

Source: Communications Earth & Environment

These environments are similar to the conditions where life is believed to have originated. Sam Purkis, a professor of marine geosciences, notes, “Deep-sea brine pools are a great analogue for the early Earth.”

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Medical Potential of Brine Pool Microbes

The unique microbes found in these brine pools are not only surviving but might also hold the key to medical innovations. 

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Collage of underwater images showing various aspects of brine pools, including the presence of marine life like shrimp, and features like microbial stains and sediment formations

Source: Communications Earth & Environment

These organisms are known to produce substances with antibacterial and anticancer properties. “Molecules with antibacterial and anticancer properties have previously been isolated from deep-sea microbes living in brine pools,” explains Purkis.

Global Presence of Brine Pools

Brine pools are rare and have been identified in only a few locations worldwide, including the Gulf of Mexico, the Mediterranean Sea, and notably, the Red Sea. 

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Underwater image capturing the dark shadow of a remotely operated vehicle cast over a brightly illuminated brine pool on the ocean floor

Source: Wikimedia Commons

These unique ecosystems vary in size and are among the most extreme environments on our planet, hosting a range of specialized life forms.

Discovery of Brine Pools Near the Coast

The discovery of brine pools just two kilometers off the coast in the Gulf of Aqaba in 2020 marked a significant breakthrough. 

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Wide-angle view of multiple brine pools on the ocean floor, bordered by contrasting mineral deposits and visited by marine creatures like crab

Source: will_jobst/X

This proximity to the shore makes them more accessible for scientific study, providing new opportunities for understanding these mysterious underwater ecosystems.

The NEOM Brine Pools

The brine pools discovered by the University of Miami team have been named the NEOM Brine Pools, after the Saudi development company that funded the research. 

Exterior view of the University of Miami's marine science building, lined with tall palm trees under a clear blue sky

Source: Wikimedia Commons

These pools were located using advanced remote-operated vehicles and include the largest known pool measuring 107,000 square feet.

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Abundant Life in Extreme Conditions

Despite the lack of oxygen and high salinity, the brine pools support diverse microbial communities that form thick carpets on the seabed. 

A top-down view of a circular brine pool on the seafloor surrounded by sediment

Source: will_jobst/X

These microbes, in turn, support various marine animals, creating a complex ecosystem that flourishes in this hostile environment.

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The Ecological Dynamics of Death Pools

The toxic nature of the brine creates a unique hunting ground for predators, which wait to prey on animals killed or stunned by the pool. 

An image of a remotely operated vehicle (ROV) equipped with lights and cameras, investigating a large, dark brine pool in the deep sea

Source: will_jobst/X

“Any animal that strays into [it] is immediately stunned or killed,” says Purkis, highlighting the brutal reality of the ecosystem dynamics around these pools.

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Geological and Biological Archives

Situated close to the coast, these pools also capture runoff from land, potentially preserving geological and biological records, including traces of past natural disasters like tsunamis and earthquakes. 

A close-up view of deep-sea clams clustered around a hydrothermal vent, encrusted with minerals and surrounded by rough sediment

Source: oceanexplorer/X

This makes them valuable for understanding historical environmental changes.

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Core Samples Reveal Historical Data

Core samples taken from these brine pools provide a continuous record of the region’s past environmental conditions, including rainfall, tsunamis, and earthquakes. 

A dramatic scene of people, including young men in pink shirts, fleeing from large tsunami waves crashing over a palm-lined promenade

Source: Wikimedia Commons

This data is crucial for understanding the historical patterns of natural disasters in the area.

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Implications for Coastal Development

The historical data derived from the brine pools is vital for planning as the Gulf of Aqaba’s coastline undergoes rapid urbanization. 

A satellite image showing the long, narrow stretch of the Red Sea flanked by desert landscapes

Source: Wikimedia Commons

Understanding the frequency and impact of historical natural disasters is crucial for future infrastructure development in this region.

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Expanding Research and Collaboration

The research team plans to return to the NEOM Brine Pools with more sophisticated equipment to extend their studies further back in time. 

An annotated scientific diagram showing the layout of brine pool research with location markers for sediment cores and a cross-section of the underwater landscape

Source: Communications Earth & Environment

“We aim to work with the other countries that border the Gulf of Aqaba to widen the assessment of earthquake and tsunami risk,” says Purkis, emphasizing the need for a collaborative approach to regional environmental challenges.

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