Fertile hermit crabs turn shy
![hermit crab](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/wt_Pagurus_bernhardus_hermit_crab_free.jpg?fit=860%2C460&ssl=1)
Hermit crabs are known for hiding in their shell homes when startled by a nearby predator (or curious scientist). The ones that are more reluctant to re-emerge may be protecting their sperm, a new study finds.
Hans Hillewaert/Wikimedia Commons (CC-BY-SA 4.0)