14/04/2016 5:26 AM AEST

Body Parts Of Monster Found In Loch Ness

Sherlock Holmes' private life can help explain this mystery.

It’s the creature explorers have spent decades searching for — just not in the flesh.

A long-lost Loch Ness monster prop that was built for a Hollywood movie in the 1960s has been found in the murky depths, researchers say.

The recognizable long curved neck and body were found about 590 feet beneath the surface by Norwegian company Kongsberg Maritime using an underwater robot equipped with sonar and cameras, the company announced Wednesday.

Jeff J Mitchell via Getty Images
Kongsberg Maritime's underwater robot, which discovered the 98-foot model, is seen being operated in Loch Ness on Wednesday.

The 98-foot prop had been built for the 1969 film “The Private Life of Sherlock Holmes” starring Robert Stephens and Colin Blakely. Before filming took place, however, the model sank into the abyss.

Loch Ness expert Adrian Shine runs The Loch Ness Project, which explores the famous Scottish Highlands’ body of water. He said he has no doubt about it being the missing prop.

Shine, speaking to the BBC, said the Hollywood model originally had two humps that provided buoyancy. At the order of the movie’s director, Billy Wilder, they were removed, likely leading to the monster sinking on its maiden voyage.

Ian Tyas via Getty Images
A fiberglass model of the Loch Ness monster is seen being created for "The Private Life of Sherlock Holmes" in July of 1969.

"We can confidently say that this is the model because of where it was found, the shape — there is the neck and no humps — and from the measurements,” he said. 

In a release, researchers called the discovery “just the beginning” of their finds while scouring the mysterious water which has long held stories of a fabled creature.

Jeff J Mitchell via Getty Images
Engineer John Haig monitors the robot as it rests in Loch Ness' water in Drumnadrochit, Scotland, on Wednesday.

"Kongsberg Maritime Ltd began surveying Loch Ness with some of the world's first multibeam sonar back in 1987,” Craig Wallace, senior subsea applications engineer at Kongsberg Maritime Ltd, said in a release.

“Over the years, the company has returned many times, bringing the latest technology to uncover the Loch's mysteries.”

Though they weren't expecting to find Nessie, he called the discovery "an unexpected bonus."

YouTube/KONGSBERG Gruppen
Researchers say they've found a long-lost Hollywood prop of the Loch Ness monster, seen here, about 180-meters below the water's surface.