Following is a transcript of the video. Narrator: If there's one thing you know about puffer fish, it's that they can do this. When aggravated by a predator, they, you know, puff up. Some puffers ...

The smile of a starry puffer, Arothron stellatus ... Scientists found that it takes a lot of energy for the fish to inflate, as shown by a five-hour recovery period post-puff. ‘Swimming while inflated ...

If you crossed a hedgehog with a fish, you'd get a puffer fish. This majestic, inflatable sea beast is one of the most unusual aquatic animals ever, with a unique set of defense mechanisms that ...