“The deep open ocean is a sensitive environment and ... “Many mesopelagic organisms vertically migrate into shallower water at night to feed in the more productive shallow waters.

Scientists using seismic data tracked groundwater levels beneath the L.A. area. They found heavy rains in 2023 boosted shallow waters, but deep aquifers remain depleted.

But from about 50 million years to 35 million years ago, during a period of intense global warming called the Paleocene-Eocene Thermal Maximum (PETM), anglerfish began moving into the vast open waters ...