The ocean covers more than 70% of our planet’s surface, yet we’ve explored less than 5% of it. Below the sunlit waves lies an alien world of crushing pressure, eternal darkness, and bone-chilling cold ...

Known as Dalhousiella yabukii, the worm resides inside a glass sea sponge—a simple marine animal that forms a glass-like skeleton—in the cold, dark waters off the coast of Japan. And it’s just one of ...

Given how underexplored the Pacific Ocean is, it is not surprising that new species are being discovered every time a manned or unmanned deep-water submersible is launched to document the species ...

Beneath the neon lights of a laser-scanning microscope, newly classified species glow in vivid greens and oranges—a far cry from the pitch-black abyss of their natural ocean floor. Researchers have ...

Lurking in the depths of the ocean are countless species that have never been seen by humans before. As part of a project to name 1,000 of these unknown animals by 2030, 24 new species of deep-sea ...

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.