Ghost crabs

Ghost crabs (also called sand crabs) are so named because of their ability to hide into the sand of beaches and dunes in which they live.
They have four pairs of legs, one pair of claws and stalked eyes that can swivel 360°.
They make a unique bubbling sound by hitting their claws on the ground and rubbing their legs together. Their scientific name Ocypode means “fast feet,” as they’re often seen darting sideways at up to 10 miles per hour.
Ghost crabs live in tiny burrows in the sand, preferring a solitary life with only one crab per burrow. The number of burrows is frequently used to assess human impacts on ocean beaches. Dug at a 45-degree angle, these burrows may be up to four feet deep. They create the angled entrances so that the onshore breeze can blow into them for ventilation. The habitats can also easily be closed off during the heat of the day to keep the crabs cool.