Cameraria marinensis is a moth of the Gracillariidae family. It is known from California, United States. The length of the forewings is 4.5-5.5 mm. The larvae feed on Lithocarpus densiflorus. They mine the leaves of their host plant. The mine is oblong and the epidermis is opaque yellow tan. The mines are usually restricted to one side of midrib, running parallel to it or the mines overlap the midrib at the apex. The mines are solitary and have one or two short folds.