Anglerfish first colonized the ocean's midnight zone 55 million years ago, during a period of extreme global warming, a new study finds. The bizarre fish adapted to thrive in the deep sea by ...

Researchers have discovered a new species of glowing sea slug deep in the ocean’s midnight zone. Monterey Bay Aquarium Research Institute (MBARI) scientists said in a press release on Tuesday ...

To estimate the biomass of fish in the twilight zone – the area of ocean at 200-1000m below sea level – scientists used acoustic instruments called echo-sounders.