A bottlenose dolphin at Dolphin Research Center, Grassy Key, Florida (IMAGE)

Duke University

A bottlenose dolphin at Dolphin Research Center, Grassy Key, Florida

Caption

If you’ve never had a problem keeping lean and burning calories before, and now you’re gaining weight, you’re not alone. Dolphin metabolisms slow down with age, too.

Credit

Dolphin Research Center, https://dolphins.org/

Usage Restrictions

Please credit Dolphin Research Center, https://dolphins.org/

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