Helicopters plucked abalone divers to safety in two separate incidents on the Sonoma County coast.
While flying to the first incident, officials received a call from friends of another diver who reported him missing. Officials soon found 48-year-old Nathan Ng of Millbrae stranded on a rock.
The spring abalone season opened April 1 and runs through the end of June.
Eight abalone divers died last year off the coast of Sonoma and Mendocino counties.