Comment on Hermit crabs evolved longer penises to keep their shells from being stolen

Hermit crabs evolved longer penises to keep their shells from being stolen

Enlarge / An adult male hermit crab of the species Coenobita compressus ambling along on a leisurely stroll. (credit: Mark Laidre) Hermit crabs protect their soft, curved abdomens from harm by scavenging seashells and turning them into portable homes. That poses a challenge when it comes time to mate, since a rival can steal the shell while its occupant is, shall we say, otherwise occupied.

 

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