Uploaded January 2023 | Updated September 2026, 13 minutes ago
Sea cucumbers breathe by sucking water into their rectums and extracting oxygen using special organs. We usually call them butt lungs. Another creature uses this to its advantage. Pearlfish swim right into the sea cucumbers' bums, and they aren't afraid or worried. But does it hurt either of them? And what happens if a hungry pearlfish tries to eat its host?
00:00 This Fish Has an Unusual Hiding Place
00:50 Creative Solution
01:04 Pearl Fish VS Sea Cucumber
02:13 Inside of a Sea Cucumber
03:00 Commensal Relationship
Questions or concerns? Contact us at underknown.com/contact
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
#crazycreatures
#seacucumber
#pearlfish
Sea cucumbers breathe by sucking water into their rectums and extracting oxygen using special organs. We usually call them butt lungs. Another creature uses this to its advantage. Pearlfish swim right into the sea cucumbers' bums, and they aren't afraid or worried. But does it hurt either of them? And what happens if a hungry pearlfish tries to eat its host?
00:00 This Fish Has an Unusual Hiding Place
00:50 Creative Solution
01:04 Pearl Fish VS Sea Cucumber
02:13 Inside of a Sea Cucumber
03:00 Commensal Relationship
Questions or concerns? Contact us at underknown.com/contact
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
#crazycreatures
#seacucumber
#pearlfish
