there is actually a resident population in SD bay....
and they frequent La Jolla Shores often... I have seen one while landing my skiff at the La Jolla launch...
And the videos below were taken by a diver just outside the surf in La Jolla at the Marine room!
https://www.youtube.com/watch?v=RKSQ78B-Jy8
https://www.youtube.com/watch?v=VGXzO19hSnE