Razor clams are back on the menu after levels of a harmful marine toxin fell and portions of the Oregon Coast reopened to diggers.

Razor clamming is open from the Columbia River to Cape Perpetua and from the Umpqua River’s south jetty to Cape Arago, state officials announced Friday. Closures remain in place from Cape Perpetua to the north jetty of the Umpqua River and from Cape Arago to the California border. These closures include all beaches and bays.

The state had previously closed portions of the Oregon Coast near Lincoln City to Winchester Bay and south of Charleston to the California border as levels of domoic acid, a naturally occurring toxin, rose to unsafe levels. Clatsop County’s beaches have not had to close yet this season. In Washington state, where the razor clamming season closed in late April, domoic acid levels remained well below the threshold throughout the season, according to reports available from the state’s Department of Fish and Wildlife.

Domoic acid has become a regular issue for coastal fisheries, impacting recreational razor clam harvests and commercial Dungeness crab seasons. The toxin cannot be cooked out of razor clam meat and can cause serious illness or even death if consumed at high enough doses.