Human remains have been found in a crocodile after a 69-year-old fisherman went missing in central Queensland.

A specialist examined the 4.2-metre crocodile in Cairns overnight, locating human remains inside.

The animal was nabbed and euthanised by Department of Environment and Science officers on Saturday near Hinchinbrook Island after being  found near the missing fisherman’s upturned boat.

The man went fishing in Gayundah Creek, near Hinchinbrook Island, about 3pm on Thursday.

He was due back after an hour but failed to return, prompting his wife to call police.

Officers found his upturned boat about 2.30am on Friday, with damage suggesting a crocodile attack.

Police conducted a search using boats and aircraft, drones and traps, and were helped by SES personnel.

They found human remains before finding the crocodile.

Police said the man was an experienced boatie, but had no safety equipment with him other than his radio.
Investigations are ongoing. Officers will prepare a report for the coroner.

-AAP