Subsea AI Data Centers Threaten Endangered Whales

Cold ocean water meets critical marine habitats

Placing servers on the seabed solves cooling costs, but the chosen locations sit squarely in vulnerable ecological zones.

Keeping high-density AI clusters cool requires staggering volumes of water and power on land, triggering municipal pushback across the country. DeepGreen Holdings wants to sidestep land constraints entirely by sinking hardware directly to the ocean floor. The company has pitched a $100 million subsea deployment split between Western Passage, Maine, and Upper Cook Inlet, Alaska.

Across both sites, the project would occupy roughly 1,650 acres of seabed. The infrastructure involves 66 sealed compute pods tethered alongside 300 tidal turbines intended to harvest local currents for electricity.

The problem lies in the geography. The Gulf of Maine is an essential corridor for the North Atlantic right whale, a species whose population hovers below 400 individuals. Upper Cook Inlet serves as the federally designated critical habitat for the endangered Cook Inlet beluga whale, whose numbers have dwindled to around 300. Pumping industrial infrastructure directly into their backyards has triggered immediate alarm among marine researchers.

DeepGreen subsea data center project details

The ecological toll of acoustic noise and heat plumes

Marine mammals do not rely on vision in murky waters; they depend on echolocation for hunting, social communication, and traveling. Placing hundreds of underwater tidal turbines alongside submerged server pods introduces continuous low-frequency noise and vibration directly into waters where acoustic clarity is a survival requirement.

Thermal discharge presents an equally severe hazard. Dissipating the fierce thermal output of dense AI chips directly into the surrounding water creates localised warm-water plumes. Marine biologists warn these temperature spikes can drive away the cold-water forage fish and krill that both belugas and right whales depend on to survive.

Conservation groups have condemned the proposal outright. Cooper Freeman of the Alaska Center for Biological Diversity called the plan dangerous for the inlet, noting that the development demonstrates a complete lack of awareness regarding the delicate state of local wildlife.

The broader rush to hide compute infrastructure

Tech firms are desperate for power and cooling solutions that bypass strained public utilities. As cities increasingly block traditional facilities over power and water concerns, companies have explored unconventional terrain, ranging from underground caverns to marine trenches. Unregulated buildouts have already triggered regulatory backlash on land, such as when regulators issued fines over unpermitted regional data centers.

While subsea data centers have undergone experimental trials before—most notably Microsoft’s Project Natick, which retrieved a small pod off Scotland in 2020—scaling the concept to industrial AI footprints in biologically sensitive coastal waters is entirely untested territory. For marine biologists, treating critical whale sanctuaries as heat sinks for server racks is a step too far.

Availability and regulatory outlook

The DeepGreen projects remain in early proposal stages and will face intense scrutiny from federal bodies before any seabed construction can proceed. Any work in US coastal waters requires rigorous environmental impact reviews from agencies including the National Oceanic and Atmospheric Administration (NOAA) and the US Army Corps of Engineers.

Given that both proposed locations involve critical habitat designations under the Endangered Species Act, DeepGreen will have to clear immense regulatory hurdles to secure permits. If environmental groups mount legal challenges as anticipated, these subsea pods are unlikely to see water anytime soon.

The scramble to support computing demand is increasingly colliding with environmental boundaries. As long as tech companies prioritize infinite cooling capacity over basic ecological preservation, public and regulatory resistance to these facilities will only intensify.