The retreating ice cover of the Central Arctic Ocean (CAO) fuels speculations on future fisheries. However, very little is known about the existence of harvestable fish stocks in this 3.3 million–square kilometer ecosystem around the North Pole.
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The giant sponge grounds found under the waters of the Central Arctic were growing on seamounts and the area was previously unheard-of, and the sponges were not thought to be able to live in that environment.