Out of an abundance of caution, access is being paused to give wildlife space and allow for ongoing monitoring. The investigation involves scientists from UC Santa Cruz and UC Davis, along with California State Parks, the California Department of Fish and Wildlife, the California Department of Food and Agriculture, the California Department of Public Health, the California Marine Mammal Stranding Network, the U.S. Department of Agriculture and NOAA Fisheries.
If you see videos of it, it looks like a scene from a horror movie. It doesn't knock them out, it doesn't stun them. They essentially will suffocate, and will be conscious while they're suffocating ... and then the ones who survive have their necks rung by these devices.