ナショナルジオグラフィックのインスタグラム(natgeo) - 2月21日 13時58分

Photograph by @paulnicklen // With ivory tusks up to 8 feet long, a pod of male narwhals, known to some as unicorns of the sea, breath before heading back under the ice to gorge on polar cod. Algae and plankton grow on the underside of the sea ice, copepods and amphipods feed on the plankton, cod feed on the amphipods, narwhals feed on the cod and polar bears occasionally feed on narwhals. So goes the cycle of life in the Arctic. Ice is like the soil in a garden….without it, things won't grow. Please follow me on @paulnicklen to see my favorite series of narwhal photographs. With @sea_legacy and @ngpristineseas

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