Yes, the Christmas Island red crab is edible, but it is not considered a traditional food in most cultures. In fact, the crabs are often referred to as "Christmas Island's national dish" and are considered a delicacy by the locals. However, it's important to note that the crabs are protected by the government and only a small number are permitted to be caught and consumed each year. It's also important to respect the local laws and customs when visiting Christmas Island.