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 ...

but some live in brackish water. Around 30 species have also been discovered living in the freshwater river systems of South America, South Asia and Africa, including the Congo potato puffer, ...

When people eat puffer fish that haven’t been prepared properly ... Wrapping up, over 120 types of pufferfish live in warm ...

There are over 120 species of puffer fish, and 22 different kinds are approved by the Japanese government for use in restaurants. But one is more prized, and more poisonous, than the others ...