“After monitoring the shark for 45 minutes, it was deemed non-aggressive and not a risk to the public,” fire officials said on Twitter.
Video footage taken from KTLA showed the shark alongside a swimmer in the ocean.
Shark sightings, lifeguard officials said, are not unusual.
“It’s very common to see juvenile white sharks off the Southern [California] coast,” they said. “The juvenile sharks we have observed have been very docile.”
The shark sighting comes more than a month after a long-distance ocean swimmer, Steven Robles, was attacked by a great white shark off Manhattan Beach.