NICE, France—The deep sea—Earth’s largest and least-explored biome—is taking center stage at the United Nations Ocean conference this week, where marine experts are demanding world leaders end bottom ...

Scientists warn deep-sea mining recovery depends on habitat, and some losses in vents and seamounts may be irreversible.

When we think of marine life, we usually picture colorful coral reefs or dense seaweed forests filled with fish and other ...

The deep sea, the planet’s most expansive and least understood ecosystem, remains largely unexplored. Yet while the deep sea may seem a dark and distant space, events underwater directly impact our ...

Mesopelagic fish, long overlooked in ocean chemistry, are now proven to excrete carbonate minerals much like their shallow-water counterparts—despite living in dark, high-pressure depths. Using the ...

From deep sea ghost sharks to symbiotic worms and unusual crustaceans, scientists have identified 1,121 new marine species in a single year through the Ocean Census initiative.