Tuesday, police said they found the decomposing body of an elderly man in Mussel Rock Park in Daly City. Around 9:42 a.m., a hiker reported the body on a nearby trail in the area of Westline Drive ...

Before and after. At left, Fisher and Hildebrand's image of a rock and its mussel bed community they sampled at Dillon Beach in 1941. At right, the exact same rock sampled by Longman in 2018.

This incident prompted health officials to advise residents to throw out any mussels harvested between the Washington border and Seal Rock State Park, as well as avoid feeding them to pets.