Scientists battle alien snails in San Francisco Bay in effort to restore native oysters
Wading into the water along the rocky shore off Aramburu Island in Richardson Bay, Brian Cheng reached 3 feet under water and pulled up an algae-covered rock. “Here we go,” he yelled as he splashed ashore soaking wet and pointed out a tiny snail on the underside of the rock. “And, we got a bonus,” he said, gesturing toward a cluster of yellow gelatinous egg capsules.