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, ...

Add Yahoo as a preferred source to see more of our stories on Google. Pufferfish can inflate up to three times their normal size by rapidly swallowing water to appear larger and deter predators.

Pufferfish have an iconic defence mechanism, but there’s more to these famous inflatables than meets the eye. Their potent poison has a fearsome reputation, linking daredevil diners, drug-user ...