Pufferfish are best known for their ability to inflate like a balloon. But if you peer inside, you typically won’t find air. You’ll find water, not to mention an accordion-like stomach, a unique set of muscles for pumping, and a poison that’s up to 1,200 times more toxic than cyanide.

MORE WHAT'S INSIDE:
What's Inside A Rattlesnake's Tail?
https://youtu.be/Yf6sNOFt07c
What's Inside A Camel Hump?
https://youtu.be/oyM_AXN_QNI
What's Inside A Venus Flytrap?
https://youtu.be/YPzp-p-na88

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What’s Inside A Puffer Fish?