beachcomber

. [ Written also beach-comber or beach comber. ] (Naut.) 1. A vagrant seaman, usually of low character, who loiters about seaports, particularly on the shores and islands of the Pacific Ocean. [ Webster 1913 Suppl. ]

I was fortunate enough, however, to forgather with a Scotchman who was a beach-comber. F. T. Bullen. [ Webster 1913 Suppl. ]

2. a vagrant living on a beach. [ WordNet 1.5 ]

3. a person who searches along a beach for objects of value, such as lost objects or seashells. [ PJC ]