From rocky coves at Mendocino and Monterey to San Diego's reefs, abalone have held a cherished place in California culture for millennia. Prized for iridescent shells and delectable meat, these unique shellfish inspired indigenous artisans, bohemian writers, California cuisine, and the popular sport of skin diving, but also became a highly coveted commercial commodity. Mistakenly regarded as an inexhaustible seafood, abalone ultimately became vulnerable...