The group is marking a decade of fishing everything from an inflatable doll to a Nintendo out of the harbour.
Rother District Council urge visitors to take safety precautions over the plastic pellets.
Ocean currents carry debris from across the Atlantic and deposit it on the islands' beaches.
Plastic nurdles are washing up on beaches more than 30 miles south of the Port of Tyne spill site.
An environmental charity warns the pellets could wash up further along the North East coast.
The RSPB says the plastic from a major sea spillage at the Port of Tyne could kill birds.
Nurdles, historic artifacts and unhappy residents. Try your hand at our North East and Cumbria quiz.
Volunteers call for Prime Minister Andy Burnham to intervene and declare it a "national disaster".
The Tyne Rivers Trust says it has already seen fish with the pellets in their system.
