This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/WouldbeWanderer on 2023-12-21 07:13:13.

Original Title: TIL that the stationary lifestyle of barnacles makes sexual reproduction difficult, as they cannot leave their shells to mate. To compensate, they evolved to have the largest penis to body size ratio of the animal kingdom: up to eight times their body length.