This in-depth guide details 126 lanternfish and 426 other species of fish from the mesopelagic zone. It was put together by a global team of experts, taxonomists and scientists, along with a ...

Where it lives: In the mesopelagic zone of the Mediterranean ... the oarfish is the world's longest bony fish. The species' elongated body is usually around 10 feet (3 meters) long, but ...

This information was used to model the expected echo from the most common species. By combining this with echosounder data, the researchers were able to estimate the mesopelagic fish biomass.

The twilight, or mesopelagic, zone — the layer of ocean ... Although the study’s findings don’t tell us about the composition of fish species in the twilight zone, how they interact with ...