![Precisely proportioned: intertidal barnacles alter penis form to suit coastal wave action | Proceedings of the Royal Society B: Biological Sciences Precisely proportioned: intertidal barnacles alter penis form to suit coastal wave action | Proceedings of the Royal Society B: Biological Sciences](https://royalsocietypublishing.org/cms/asset/7dd548fe-9bfd-4933-8c6c-eb127efd342f/1081fig5.jpg)
Precisely proportioned: intertidal barnacles alter penis form to suit coastal wave action | Proceedings of the Royal Society B: Biological Sciences
![Maris Wicks on Twitter: "#mermay : barnacle edition: part two Fun fact: Barnacles have the largest penis to body size ratio in the animal kingdom. https://t.co/qPODnwSRkL" / Twitter Maris Wicks on Twitter: "#mermay : barnacle edition: part two Fun fact: Barnacles have the largest penis to body size ratio in the animal kingdom. https://t.co/qPODnwSRkL" / Twitter](https://pbs.twimg.com/media/DeiU8kIXkAArjzJ.jpg:large)
Maris Wicks on Twitter: "#mermay : barnacle edition: part two Fun fact: Barnacles have the largest penis to body size ratio in the animal kingdom. https://t.co/qPODnwSRkL" / Twitter
![Anna Rothschild on Twitter: "@NerdyAndQuirky @TheTierZoo @sallylepage @SimoneGiertz Many years ago I made a short video barnacle penises, and let me tell you, they are even weirder than you could imagine: https://t.co/jCsr36i6wS" / Anna Rothschild on Twitter: "@NerdyAndQuirky @TheTierZoo @sallylepage @SimoneGiertz Many years ago I made a short video barnacle penises, and let me tell you, they are even weirder than you could imagine: https://t.co/jCsr36i6wS" /](https://pbs.twimg.com/media/Ds82-h8U4AAUyTw.jpg)