They are the Bay's majestic apex predators, critical to the aquatic food web and leading indicators of the health of the entire Bay ecosystem. Yet, relatively little is known about the eleven species of shark who call the San Francisco Bay home. What is the size, range, and biology of each of these populations?
California's outer coast once boasted 27 miles of Bay Area beaches. Up until the 20th Century, these beaches provided a natural buffer for the inner land areas; then came freeways, airports and downtowns. KALW's Ben Trefny spoke with Robin M. Grossinger, Senior Scientist and Historical Ecology Program Director at the San Francisco Estuary Institute about California beaches, landscape heritage and how some of these areas have rebuilt themselves.