the habitat of the mediterranean monk seal has changed over the years. prior to the 20th century, they had been known to congregate, give birth, and seek refuge on open beaches. since sealing had ended, they have left their former habitat and now only use sea caves for such behavior. more often than not, these caves are rather inaccessible to humans due to underwater entries, and because the caves are often along remote or rugged coastlines. scientists have confirmed this is a recent adaptation, most likely due to the rapid increase in human population, tourism, and industry, which have caused increased disturbance by humans and the destruction of the species' natural habitat. because of these seals' shy nature and sensitivity to human disturbance, they have slowly adapted to try to avoid contact with humans completely within the last century, and perhaps, even earlier. the coastal caves are, however, dangerous for newborns, and are causes of major mortality among pups when sea storms hit the caves.