If you’ve ever sifted along a tide pool or visited a souvenir stand on a coastal boardwalk, you may have seen a hermit crab. To gather data about their surroundings, Pagurus bernhardus, a common hermit crab species, uses small hair-like structures called sensilla. The small hairs on a hermit crab’s claws are called sensilla. The analysis revealed that the bolder hermit crabs have more sensilla located on the claw’s surface. “Our new research suggests that in hermit crabs, some of this variation may be linked to how individuals sense the world around them.