Porthilly shellfish, based at Porthilly on the Camel Estuary, are growers, wholesalers and purifiers of Mussels, Oyster and Clams. The business also supplies other seasonal produce from the estuary and coastline including the increasingly popular Samphire (a seaweed like vegetable also known as glasswort).

Starting out life purely as a small oyster farm with one site on the Rock side of the Camel estuary, the business has expanded over the years to cover 4 sites on either side of the estuary. Now growing Pacific oysters and Blue Mussel for wholesale and retail. On site purification facilities mean that the business can sell its produce into local restaurants and food outlets.