And it is set to spark further speculation that Nessie may be about to make a long-awaited reappearance.
Captured on underwater scanning equipment aboard the Jacobite Queen, the clear reading appears to show a large object in the deep waters below.
The screenshot – revealed just days after satellite images apparently showing a mystery object in the loch were published – will cause fresh excitement among frustrated Nessie hunters, following a more than a year without a "sighting" of the monster.
The image was recorded by sonar equipment aboard the flagship vessel of Inverness-based Jacobite Cruises.
Skipper, John Askew, said: "This image certainly grabbed our attention. The Jacobite Queen spends every day sailing up and down the loch with the sonar on and this reading is the most unusual we have seen for quite some time.
"It’s impossible to tell what we’ve picked up here, but along with those satellite images, you can’t help feeling that reports of the Loch Ness Monster’s demise may be premature.
"Nessie captures the imagination of people all over the world and, if anything, the speculation around lack of recent sightings has increased that interest."
Read Full Story: Highland News UK