3 Animals That Breathe Through Their Butts

If you want to be able to breathe underwater, you’re going to need to get creative. So some turtles, dragonfly nymphs, and sea cucumbers decided to use their butts.

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Sources:
http://www.straightdope.com/columns/read/2325/is-it-true-turtles-breathe-through-their-butts
http://onlinelibrary.wiley.com/doi/10.1002/jez.1055/abstract
http://news.discovery.com/animals/why-do-some-turtles-breathe-out-of-their-butt-140617.htm
http://caledonianrecord.com/main.asp?SectionID=5&SubSectionID=159&ArticleID=38602
http://illuminationstudios.com/archives/63
https://books.google.com/books?id=qKHwCAAAQBAJ&pg=PA102
http://jeb.biologists.org/content/44/2/317.full.pdf
https://books.google.com/books?id=DyyJIb2IvKAC&pg=PA19