Followed categories will be added to My News. An extensive search of Noosa waters to investigate an alleged croc sighting has concluded, with many speculating on the likelihood of its existence.

Queensland's environment department investigates reports of a crocodile sighting at Noosa, after an experienced angler captures what he describes as a "very clear" image on underwater equipment.

The search for a crocodile reportedly seen by a fisherman in the Noosa River continues, but authorities say there have been no additional sightings.