REEF fishermen can help researchers discover more about whale sharks in the Great Barrier Reef.
The Eye on the Reef app, created by the Great Barrier Reef Marine Park Authority, has six confirmed sightings of whale sharks this month --- that's the most they've ever had.
GBRMPA industry engagement Chris Jones said the app helped gather data to later be used in surveys and studies.
And with a recent sighting off the Agnes Water coast, the Mr Jones wants more of the Gladstone region to take part.
The knowledge of whale sharks in Queensland is dire --- while in Western Australia their migration paths and breeding habits are known.
"At the moment we have no clue how many are out there - there could be a dozen or thousands," Mr Jones said.
"The fact that we can learn about these incredible marine species from joe blow who is just fishing out on the Great Barrier Reef is fantastic."
The app is available on Apple or see here for reported sightings.