puffer fish are not like balloons. Because what's normally inside them isn't air. It's water. Elizabeth Brainerd: What they do is they actually take water into their mouths in a big mouthful of ...

If other fish are too big to eat, they'll nip at their fins and stress them out. It's not the puffer's fault. They're just weird, bubble-shaped carnivores. While we're talking about puffer fish ...

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 ...