These are the most interesting little creatures. From what I have gathered they are called sand crabs. They mainly come out at night to feed. I think it is really interesting how they crawl sideways. They have all of these tiny little holes that they have dug and if you get too close to them and they get scared, they move very fast into them.
These were taken on the vacation I took with my family this past summer in Duck, North Carolina, on the Outer Banks on my daily sunrise walks.
