Meet the Atlantic wolffish, green humphead parrotfish, and other unusual species with extraordinary adaptations.

Many of the fish lurking in the depths of the ocean resemble the alien villains of horror films, with gargantuan teeth, glow-in-the-dark bodies and bulging eyeballs. But why do these fish have such ...

A deep-sea predator equipped with tubular, light-amplifying eyes and a highly specialized jaw system is capturing scientists' attention for its extraordinary ability to thrive in pitch-black waters.

The second expedition took researchers to the Southern Ocean’s Bellingshausen Sea, off West Antarctica. The team was the ...

The fish was found at 200 to 2,000 meters below the surface. At least 16 types of recently discovered deep-sea fish are among the darkest creatures ever found, according to a study published Thursday.

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 ...

Scientists found thousands of patterned fish nests in Antarctica’s Weddell Sea, boosting calls for marine protected areas.