Ocypode cordimana ミナミスナガニ also Smooth-eyed Ghost Crab and Smooth-handed Ghost Crab
The Ocypode cordimana is a Ghost Crab. They live in burrows in the run real fast and feed mainly at night. They live on land but can take refuge in the surf.
A front view of Ocypode cordimana. They can appear very different sometimes.