0 someone who searches the mud (= soft, wet ground) near rivers trying to find valuable or interesting objects: --
Edmond's trainer was hoping for softer ground for the confirmed mudlark.
Beachcombing has provided a way of life for generations of mudlarks living close to the tidal foreshores of the Thames and the Medway.
Poor Victorian children, nicknamed mudlarks, used to dig at low tide in the foul-smelling muck of the Thames to scavenge lumps of coal and other items they could sell for a few pence.