Assertion: humpback whale | /r/CapableOf | live off their fat reserves
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Source sentences:
text: 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.
text: They feed in polar waters, and migrate to tropical or subtropical waters to breed and give birth, fasting and living off their fat reserves.