El Porto Beach in Manhattan Beach reopened Wednesday morning after a shark sighting in the area the day before.
A Los Angeles County Sheriff's Department helicopter spotted the shark, prompting lifeguards to clear the ocean of swimmers and surfers. KTLA reported that the shark was swimming about 15 feet from a surfer.
The helicopter circled over an area near the north end of the beach close to El Porto Beach, officials said. Personnel in the aircraft used a public address system to warn people.
County lifeguards, however, downplayed the sighting. A lifeguard boat responded to the area and reported seeing a juvenile shark about 4 feet long.