Skates have several features that help them bury themselves. Their bodies are flexible and can be flattened to fit into tight spaces. They also have strong pectoral fins that they can use to dig into the sand or mud. Skates also have a layer of skin that is covered in tiny scales. These scales help to protect the skate from the abrasive effects of the sand or mud.
When a skate wants to bury itself, it will start by digging into the sand or mud with its pectoral fins. It will then use its body to push itself down into the substrate until only its eyes and spiracles are visible. Skates can remain buried for long periods, and they will only come out when they are ready to feed or move to a new location.
The ability to bury themselves in sand or mud is a valuable adaptation for skates. It helps them to avoid predators and to ambush prey. Skates are also able to use this adaptation to thermoregulate. By burying themselves in the sand or mud, skates can stay cooler in hot weather and warmer in cold weather.