More great white sharks are showing up along the beaches of Southern California.
Swimmers were told to leave the ocean as soon as possible while the predators gained ground.
A jump in shark sightings close to Southern California shores have put lifeguards on higher alert.More news: Middlesbrough captain devastated as Premier League relegation confirmed
It's also recommended that people stick to populated beaches and avoid remote locations, especially where rivers empty into the sea.
"The water's pretty murky so I didn't get really good footage" Experts believe the sharks spotted Thursday were most likely juvenile great whites, about 5-6 feet long.
Advisory signs were posted throughout a 1.5-mile stretch of the beach where sharks were sighted, from Grenada Avenue to 72nd Place. Stockbridge noted the earliest the shark warning advisory could be lifted is on Saturday.
This weekend, for the first time, there will be a "shark boat tour" taking off from Dana Point, just down the coast.More news: NBC reverses position, renews 'Timeless' for a second season
Fire captain Cameron Abel, of the Marine Safety Unit in Long Beach, said the increase in shark sightings is similar to an influx seen at this time past year.
Chris Lowe of the Cal State Long Beach Shark Lab took an overnight boat ride to tag the sharks and track their every single movement.More news: Wall hits late 3, forces Game 7