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Science and Nature

Barnacles Go To Unbelievable Lengths to Hook Up

See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.

Barnacles Go To Unbelievable Lengths to Hook Up

Season 9 Episode 6 | 3m 58s | CC

Acorn barnacles might look like jagged little rocks at low tide, but they have a surprisingly wild sex life. These crusty little animals — related to crabs and shrimp — have the longest penis of any animal relative to their body size. It’s up to eight times the length of the barnacle itself!

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