Why do periwinles live in crevices?

Periwinkles, or marine snails, live in crevices to protect themselves from predators and harsh environmental conditions, such as strong waves and desiccation during low tide. These sheltered locations provide a stable microhabitat that helps maintain moisture and temperature. Additionally, crevices offer access to food sources like algae while minimizing competition with other organisms. This behavioral adaptation enhances their survival and reproductive success in intertidal zones.