Sea+mammal

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media type="youtube" key="DWsN63PRCW8?version=3" height="315" width="420" Blue Whale song

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Polar bear vs walrus media type="youtube" key="0mgnf6t9VEc" width="560" height="315"

Narwhal media type="youtube" key="MSjjHiysBbE" width="560" height="315"

Humpback whale media type="youtube" key="joBvuEJyUd0" width="560" height="315"