Qld man's speargun found on sea floor

Police divers have found a speargun and other gear belonging to a missing fisherman on the bottom of the sea near Cairns.

The 26-year-old failed to return to his boat at Sudbury Reef on Saturday afternoon.

A companion raised the alarm and police carried out an extensive search over more than 135 square kilometres.

Senior Constable Matt Cornish says the man's speargun and other diving equipment have been found on the sea floor.

"The items that were located by police divers on Sunday afternoon were in close vicinity of the boat, which was still anchored there," he said on Tuesday.

A report will be prepared for the coroner.