Science News from research organizations The deep ocean has a missing link and scientists finally found it Hidden in the oceans twilight zone, mid-sized fish are quietly powering the food web from below. Date: December 28, 2025 Source: Woods Hole Oceanographic Institution Summary: Scientists have uncovered why big predators like sharks spend so much time in the oceans twilight zone.

The answer lies with mid-sized fish such as the bigscale pomfret, which live deep during the day and rise at night to feed, linking deep and surface food webs. Using satellite tags, researchers tracked these hard-to-study fish for the first time.

Their movements shift with water clarity, potentially altering entire ocean food chains. Share: Facebook Twitter Pinterest LinkedIN Email FULL STORY Scientists followed the movements of big-scale pomfret by fitting them with satellite-based tracking tags and releasing them back to the ocean.

Credit: Danny Mears Scientists at the Woods Hole Oceanographic Institution (WHOI) have found that large sharks can spend hours far below the ocean surface in the mesopelagic zone, a layer stretching from 200 to 1,000 meters (650 to 3,300 feet) deep. This dim region contains more living biomass than any other part of the ocean.