A mudlark is someone who scavenges the banks and shores of rivers for items of value, a term used especially to describe those who scavenged this way in London during the late 18th and 19th centuries.
Mudlarks of Victorian London (The Headington Magazine, 1871)
A buckle found by a member of the Thames Discovery Programme on the Thames foreshore at the Tower of London
Fragments of pottery found while mudlarking on the River Thames in central London
Beachcombing is an activity that consists of an individual "combing" the beach and the intertidal zone, looking for things of value, interest or utility. A beachcomber is a person who participates in
Mudlark
…Britain at Low Tide Beachcombing - the practice of searching beaches for items of value, interest or utility Junk man…
Beachcombing in Suva, Fiji
Beachcombing at Belle Isle State Park in Virginia, United States