Complex sentence: A large shellfish farm raising Japanese (kumamoto) oysters, the Drakes Bay Oyster Company, currently operates under dispute in Drakes Estero, as the farm's permit has expired and the National Park Service intends to remove the farm from the park.
Split into simpler sentences: A large shellfish farm raising Japanese (kumamoto) oysters, the Drakes Bay Oyster Company, currently operates under dispute in Drakes Estero. The farm's continued operation is the subject of significant controversy, as the farm's permit has expired and the National Park Service intends to remove the farm from the park.