Sea ice is an essential element of the dynamics of the Arctic Ocean and the ecosystems it supports. Biological productivity is high at the ice edge, supporting fish and mammals, seals and polar bears included. The annual cycle of sea ice extend reaches its minimum in September. News are expected to break soon, whether minimum ice coverage of the sea is getting lesser again. Overall ice is getting thinner too. Ice coverage determines the heat uptake of the Artic ocean.
Source & more: The sea ice orchestra