A previous study done in the Osa Peninsula of Costa Rica found a correlation of the claw size of hermit crabs and their boldness in undisturbed and disturbed beaches. Our study replicates this at a similar location on the Osa Peninsula. We compared boldness of crabs from disturbed and undisturbed beaches as well as the size of the hermit crabs themselves. Our results found that rather than size, density was the main factor of boldness in crabs. This study is extremely relevant because it showcases the possible unexpected consequences of human disturbance to the ecosystem.