"Labeled for reuse" Wikipedia
Belugas are no exception, they like all other mammals, rely on lungs to breath. After filling their lungs two-three times they enter the depths for up to 15 minutes. Prompting need they can dive to depths greater than 40 meters. They take life leisurely only occasionally reaching speeds higher than 22km/hr.
It is reported that Belugas tend to breath more frequently, up to three times a minute. I've observed Nemo breathing on average one every three circuits, approximately every 1-2 minutes.
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| Screenshot taken on the webcam courtesy of Vancouver Aquarium |
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