Ross Shellfish – Mae’r cwmni hwn yng Nghaernarfon yn gwerthu gwichiaid yn ogystal â physgod cregyn eraill gan gynnwys cregyn gleision, cregyn cylchog a chregyn bylchog.
Ross Shellfish - Based in Caernarfon, it supplies periwinkles as well as other shellfish products including mussels, clams and scallops.