Sperm whales are free-diving experts, but it's a skill calves have to learn. #DolphinsUpClose

Nat Geo Wild Sperm whales are free-diving experts, but it's a skill calves have to learn. #DolphinsUpClose can be watched for free online, just open the FREECABLE TV App to see more information.

Sperm whales are free-diving experts, but it's a skill calves have to learn. #DolphinsUpClose

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Sperm whales are free-diving experts, but it's a skill calves have to learn. #DolphinsUpClose

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