Animal planet - Grey whale
The humpback whales spend the summer months in the colder, polar waters and then the humpback whales migrate south in the winter to the warmer tropical waters where the humpback whales live off their fat reserves until they migrate north again in the summer. The average humpback whale can travel to around 25,000 km every year when the humpback whale migrates between the north and the south.

Animal planet - Grey whale

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