Global cooling helped life flourish in ocean’s twilight zone

The research team tracked the development of the largest and least understood habitat on Earth, home to a wide range of mysterious creatures, including plankton, jellies, krill, squid and fish.

The ocean’s twilight zone extends from 200 to 1,000 metres below the ocean’s surface. Within it is a hidden treasure of biomass and biodiversity that is key to the health of our oceans.

https://www.ucl.ac.uk/news/2021/mar/global-cooling-helped-life-flourish-oceans-twilight-zone