Ghost Crab

"Ghost crabs dominate sandy shores in tropical and subtropical areas, replacing the sandhoppers that predominate in cooler areas. They breathe through gills, which they periodically wet with seawater. Adult ghost crabs dig deep burrows, comprising a long shaft with a chamber at the end, occasionally with a second entrance shaft. They remain in the burrow during the hottest part of the day, and throughout the coldest part of the winter." (wiki)