Surfer Vivian Phongngo was stalked by a great white shark at Newport Beach, California, but she didn't notice it until it was too late. The incident occurred shortly after she reported it to lifeguards, who initially believed it to be a dolphin. The shark was not found, prompting authorities to evacuate the water one mile east and west of its last known location. The sighting was not considered a publicity stunt, but was deemed a credible by lifeguards.