Pismo Beach was once the Clam Capital of the World. Then the clams disappeared
More than a century ago, farmers with horse-drawn plows would comb the sand and haul the clams off by the wagon-full. The meat was fed to the hogs. Softball-size bivalves were so abundant, they could be found rolling ashore by the dozen at high tide.
Though the clams survived elsewhere, in Pismo Beach they had all but disappeared. Which is why scientists are trying to answer a perplexing question: What happened to the Pismo clam?