A GREAT hammerhead shark caught off a Geraldton beach — and measuring nearly 4m long — is believed to an unofficial world record.

It took Jamie Dennis and Mitchell Palmer 90 minutes to reel in the 3.85m monster at Pages Beach, Geraldton, on Saturday.

Caught on a 65lb line, it is thought the beast could be an unofficial world record for line class weight.

After measuring it’s length and taking a few souvenir photographs, the mates turned the shark around and released it out to sea.

Camera Icon Fisherman Jamie Dennis with a 3.85m great hammerhead shark caught off Pages Beach, Geraldton. Credit: Supplied, Frontline Fishing/Craig Wise.

It was followed on a kayak for about 100 metres before it “disappeared into the deep”.

Because the shark’s girth was not measured the record cannot be claimed officially, according to reports.

The great hammerhead is the largest species of hammerhead shark and can grow up to 6m long.