The future of an oyster farm in the Point Reyes National Seashore is still murky after a new report criticized the National Park Service's environmental review of the farm.

A National Research Council report Thursday said the park service lacked strong scientific data needed to determine the impact of Drakes Bay Oyster Co. on the environment, the Marin Independent-Journal reported.

Part of the National Academy of Sciences, the council is a congressionally chartered group that provides policy recommendations.

The oyster farm has been in the park for decades, but its lease expires Nov. 30.