to the North Sea brown shrimp and is considered a staple for the penguins, seals and whales of the Southern Ocean. As such, its role in the waters of the Antarctic is just as central as that of the polar [...] else in the world, in the waters of the Arctic and Antarctic there are algae that float freely in the water as phytoplankton, but as long as the water is covered by a layer of ice, they lack the light they [...] supply the creatures of the deep sea with food. (Diagram: ArcCoML) Surviving in the twilight But regardless of whether or not the disappearing ice will mean new challenges for the polar cod, the most central