A study conducted by the EFICA Consortium, as part of the MOSAiC expedition, has revealed the presence of a deep scattering layer (DSL) of zooplankton and fish in the Amundsen Basis's Atlantic water layer, at depths of 200-600 meters. This finding includes large specimens such as Atlantic cod, which were unexpectedly found at these latitudes and depths. The research highlights the existence of a new trophic level in the central Arctic ecosystem, with potential food sources for mammals like seals and walrusses. However, a subsequent study published in Science Advances concludes that the Eurasian Basin does not host, and likely will not in the future, any harvestable fish stocks due to the Central Arctic Ocean's low nutrient levels and limited biological productivity. This discovery underscores the need for international protection and a ban on commercial fishing for at least the next 16 years, akin to the Antarctic's regulations, to ensure the ecosystem's preservation.