The crash was reported at about 10:25 p.m. in the marshes east of the bridge, a fire dispatcher said.
The pilot, the sole occupant of the plane, was uninjured in the crash, according to the dispatcher, who said members of the fire department, the California Highway Patrol and the U.S. Coast Guard were assisting at the scene of the crash.
The Federal Aviation Administration is investigating the crash, according to CHP Officer Marc Johnston.
