From the Marin Independent Journal today:
A large, unusual concentration of big sturgeon in San Pablo Bay has scientists baffled and local fishermen thrilled. Thousands of the lumbering bottom-feeding fish seem to be gathered in the waters between the Carquinez Strait and the Tiburon Peninsula. Sport anglers, who generally are accustomed to long and tedious hours of fishing to catch just one sturgeon, are deeming 2011 one of the best fishing years in history. But just why the white sturgeon -- whose smaller and rarer cousin, the green sturgeon, is a threatened species -- are swarming in San Pablo Bay more than elsewhere is uncertain.
Also, I found this one on Flickr.