Uploaded January 2023 | Updated September 2026, 2 hours ago

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Did you ever have one of those days when things feel upside down, and you can’t quite get your feet back under you? Luckily, this crab has a friend to set it right. Each horseshoe crab begins its life on its back and is quite comfortable there. It learns to swim upside down and uses its tail as a propeller.

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Produced by the makers of What If. Check out our other channels:
What If - bit.ly/youtube-What-If
How to Survive: bit.ly/how-to-survive-show
Aperture: bit.ly/aperture-show
Your Body On: bit.ly/your-body-on-show
Origins of Food: bit.ly/origins-of-food
Versus: bit.ly/versus-show
WTF Did I Just Watch: bit.ly/wtf-did-i-just-watch

Crazy Creatures presents the incredible wonders of animal diversity and takes you to some of the most remote and hostile corners of the globe in order to find the ugliest, slimiest and downright weird creatures that grace the planet.

An Underknown show: underknown.com
Contact us at underknown.com/contact