In a public letter, 15 marine scientists and legal scholars warned that mining may destroy deep-sea habitats, drive species extinct, and introduce vibrations, noises, chemicals, and clouds of sediment into the ecosystem. About 1,000 meters below the ocean’s surface, the last traces of light from the sun and moon disappear into inky black. Among the ocean’s strongest divers, sperm whales and leatherback sea turtles can swim to the threshold, but rarely do they enter these lightless depths. This is the “midnight zone,” and entering it is like plunging into another planet. In fact, considerable amounts of litter can now be found in the deep sea.

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In the 1950s, it was believed we knew more about the surface of the moon than the deep seas on Earth. Since then, humans have landed on the moon’s surface and have dived nearly seven miles in a submersible to the ocean’s deepest point. Like many other deep sea creatures, it eventually becomes capable of producing its own light through bioluminescence when it is ready to move on to the deep sea. One of its many light-producing photophores can be found on a barbel attached to its lower jaw, which it most likely uses for hunting.
The Deep Reef Observation Project (DROP) is a Smithsonian research program launched to explore marine life and monitor changes on deep reefs in the southern Caribbean. Scientists turn to submarines to explore at depths too great for SCUBA gear. The Curasub is a 5-person manned submersible capable of descending to 1,000 feet. The state-of-the-art sub is equipped with hydraulic collecting arms that allow for the collection of marine life and the deployment of long-term monitoring devices on the deep reef.

Geopolitical landscape of deep sea mining

The family includes about 51 species and have a distinguishable upward-facing mouth. For decades, scientists believed the barrel eye’s strange tubular eyes were fixed in place. Only in 2009 did submersible footage reveal they can actually rotate inside the transparent dome, giving the fish a panoramic view of its world. The eyes are tinted green, thought to filter out sunlight from above so the fish can focus on the faint bioluminescence of drifting prey. The blobfish isn’t a swimmer so much as a drifter, hovering just above the seafloor with almost no effort.

Temperature

• The goblin shark is the only survivor of a family called Mitsukurinidae, a lineage some 125 million years old.
• The biotic communities differ according to the water depth, and their occurrence chiefly depends on the available nutrients.
• Fangtooth fish are voracious predators and are thought to use contact chemoreception to find prey in the deep, dark ocean, relying on luck to bump into something edible.
• Deep-sea animals have had to evolve, often through unusual and unique adapations, to live, reproduce, and thrive in these unique conditions.
• Many creatures that lived on the volcano millennia ago are now long gone – yet their remains linger.
• The blobfish isn’t a swimmer so much as a drifter, hovering just above the seafloor with almost no effort.
• The world’s oceans have roughly 300 times more area to support life an do the world’s continents.

The smaller teeth and longer gill rakers of juveniles suggest they feed primarily by filtering zooplankton from the water. The marine hatchet fish is also endowed with bioluminescent properties, which allow it to evade predators lurking in the depths below — it’s more of a defensive ability rather than an offensive one. It uses a technique called counter-illumination that enables it to match the light intensity with the background. While you could see some resemblance to other shark species, this animal has its own striking particularities.

Bound by Sediment, Held by Family Exploring The Fascinating World of Tanaidacea with Dr. Marta Gellert

Not every anglerfish species uses this strategy, and scientists still debate why it evolved in some but not others. One idea is that because females are rare and widely dispersed, males that permanently attached themselves had a better chance of passing on their genes than those that remained free-swimming. In the deep sea, efficiency is everything and the anglerfish has perfected one of the strangest solutions evolution ever produced. The deep sea has a reputation for producing “monsters.” Headlines describe its inhabitants as “freakish” or “terrifying.” But that framing misses the point.

• Less than a week after the announcement, TMC submitted an application to the U.S. government to mine in the Clarion-Clipperton Zone.
• And last but not least, many deep-sea organisms have large eyes, helping them pick up the tiny amounts of residual light in the water or the light signals put out by other fauna.
• Many deep-sea organisms are capable of producing light, either on their own or with the help of bacteria.
• In the first few tens of metres there would be some light remaining, but this would start to fade rapidly.
• However, mining them is a technically complex and correspondingly expensive undertaking.
• His mouth fuses with her skin and the bloodstreams of the two become connected.
• The Ocean Census accelerated discovery in 2025 through global expeditions, empowering scientists, funding taxonomy, whilst engaging thousands worldwide.

Threats to underwater cultural heritage: deep-sea mining

This project utilizes the taxonomic expertise of more than a dozen Smithsonian scientists and employs modern molecular tools and digital photography and videography to fully document species and genetic diversity on deep reefs. But in fact, producing light in the deep is the norm rather than the exception. Some creatures produce their own light to snag a meal or find a mate in a process called bioluminescence. The extreme saltiness causes significantly denser water than the average ocean water and, like water and air, the two do not mix. The salt difference is so definitive that sitting above the brine lake, you can visibly see the lake’s surface—even waves when the lake is disturbed.

According to UN regulations (UNGA Res 61/105), deep-sea fisheries are meant to avoid what is known as ‘Significant Adverse Impacts’ upon vulnerable marine ecosystems. To reach the nodules, deep-sea mining companies are testing robotic technologies. The Canadian-based “The Metals Company” (TMC) has developed a process in which a vehicle, Deep Sea about the size of a bus, would journey underwater, grab the nodules, and send them up a miles-long vertical tube to a ship waiting on the surface.