Update Oct. 20, 12:45 p.m.
The shark advisory has been lifted since no sharks have been sighted in the area 24 hours after Monday's sighting.
Update 5:15 p.m. The beach closure has been lifted following a hammerhead shark sighting Monday morning in Newport Beach. According to Newport Beach lifeguards, the closure ended at 4:30 p.m., but a shark advisory remains in effect in the area. That advisory will be reevaluated Tuesday morning.
12:59 p.m. Hammerhead shark sighting closes a stretch of Newport Beach
Another hammerhead sighting, another SoCal beach closure. This time, lifeguards say they've closed a two-mile stretch of Newport Beach after an 8-foot shark was spotted just off the pier at around 11 a.m.
That prompted officials to close waters along the beach from 10th Street to 4oth Street — about a mile in either direction from where the shark was seen, Newport Beach lifeguard spokesperson Jennifer Manzella said.
"The shark did not display any aggressive behavior," Manzella said. "Lifeguards will keep an eye on the situation and reassess throughout the day." The beach could reopen later Monday if no other sightings are reported, or more of the area could be closed if the shark is seen further down the beach, she added.
The beach should be reopened by Tuesday morning, Manzella said.
Monday's hammerhead sighting follows a series of others in the area in recent months. Oceanography experts have said warmer El Niño waters are bringing them farther north and cautioned that hammerheads are likely to remain in Southern California through the winter and possibly even into the spring.