Jens Heller was paddling out at San Mateo County's Montara State Beach, when a shark clamped down on his board.

Great white sharks are the species responsible for most human shark-bite fatalities, and often attack their prey from underneath ... surfer's silhouette for the outline of a seal.

Biologist Laura Ryan said the predator often attacked its prey from underneath, occasionally mistaking a surfer's silhouette for the outline of ... interaction" with the shark's behavior.

Fellow surfer Tommy Shilts , who witnessed the incident, told 3NEWS: "He caught the bottom jaw of a pretty large shark, it looked like. But it just kind of bumped him from underneath. He said it ...

His pings between September 2020 and January 2022 connect to show what appears to be the outline of a huge shark, with the tail in Nova Scotia, the body along the east coast and head pointed at ...

He has previously made trips to Florida around the same time of year, and in 2022, he went viral after his tag pings revealed that he had seemingly created a portrait of a shark outline in coastal ...

Lights could prove a non-invasive means of shark ... underneath, lead researcher Laura Ryan said. They are thought to be colour blind and sometimes mistake a surfer's silhouette for the outline ...