California Dept. Fish and Game
If you can't get out in a boat, there are a few locations, piers and docks, where you can throw in a line or a crab net: The Del Norte Street pier, Adorni Center dock at the foot of L Street, North or South Jetties, or the boat ramp at foot of Samoa Bridge.A fishing license is required and it is advisable to check with the Dept of Fish and Game to find out what is in season.
See link in sidebar.