Deep-Sea Mining Could Wipe Out Half of Hydrothermal Vent Snails, IUCN Warns

Life That Shouldn't Exist, Now Under Threat

Hydrothermal vents sit miles below the ocean surface, spewing mineral-rich, superheated water in total darkness. No sunlight, no plants, crushing pressure — and yet, snails, mussels, and other mollusks have evolved to thrive there, feeding on bacteria that convert chemicals from the vents into energy. It's one of the strangest, most resilient ecosystems on Earth.

Now the International Union for Conservation of Nature (IUCN) says that resilience is being tested by something these creatures never evolved to handle: industrial mining equipment. A newly updated Red List assessment finds that deep-sea mining for minerals like copper, cobalt, and manganese — the same metals powering EV batteries and electronics — could push more than half of known vent-dwelling mollusk species toward extinction.

Why Vents Are a Mining Target

Hydrothermal vents deposit valuable metals as mineral-rich chimneys and crusts form around them over centuries. That makes vent fields attractive targets for companies and countries racing to secure supply chains for battery materials and rare metals, especially as demand for clean energy tech accelerates.

The problem: many vent mollusk species exist in tiny, isolated patches — sometimes just one or two known vent sites worldwide. Unlike coral reefs or coastal ecosystems, these creatures can't simply relocate or repopulate from a neighboring region if their habitat is destroyed. Strip a vent field for its minerals, and you may be eliminating an entire species in one move.

What the IUCN Actually Found

The update evaluated dozens of mollusk species tied to vent ecosystems and concluded that mining activity — combined with the slow recovery rate of these fragile habitats — puts more than 50% of them at serious risk of extinction. Vent ecosystems take decades or longer to recover after physical disturbance, if they recover at all, since the chemical and thermal conditions that sustain them can shift permanently once the vent structure is disrupted.

This isn't a hypothetical future risk. Exploratory mining licenses and technology testing are already underway in international waters, particularly in the Pacific, even though there's no finalized global regulatory framework governing deep-sea mineral extraction.

The Bigger Picture

This assessment lands in the middle of an ongoing fight at the International Seabed Authority, where nations are still negotiating whether — and how — commercial deep-sea mining should be allowed to proceed. Environmental groups and scientists have pushed for a moratorium, arguing regulators are moving faster than the science can keep up with. Mining proponents counter that deep-sea minerals are essential for the clean energy transition and geopolitically important as countries look to reduce reliance on land-based mining, much of which is concentrated in a handful of countries.

The IUCN update doesn't settle that debate, but it does add hard data to one side of it: an entire category of ocean life, adapted to conditions almost nowhere else on the planet, may not survive the industry's expansion if current plans move forward unchecked.