Marine Robot Finds a 'Monster' in the Depths of Scotland's Loch Ness

— -- A monster has been discovered in Scotland's famous Loch Ness -- but not exactly the Nessie that enthusiasts of the elusive creature may have been hoping for.

Scientists and experts were surveying the 755-foot deep body of water with a marine robot when they stumbled upon a 30-foot monster model from the 1970 film, "The Private Life of Sherlock Holmes," directed by Billy Wilder and starring Robert Stephens and Christopher Lee.

"Although it is the shape of Nessie, it is not the remains of the monster that has mystified the world for 80 years," the official Scottish tourist board said in a statement. "It is thought the model sank after its humps were removed, never to be seen again -- until now."

For the past two weeks, experts from the Loch Ness Project, in conjunction with Kongsberg, a Norwegian company, have been looking for a trench in the depths of the Loch Ness. They have been working with Munin, a 13-foot long marine robot equipped with sonar imaging equipment.

"The trench was not there," Adrian Shine from the Loch Ness Project told ABC News. "But there's plenty to look for in the Loch Ness!"

A 27-foot long shipwreck was also uncovered, Shine added.

Despite no evidence of a real monster, the mystery surrounding its existence is worth an estimated $85 million to the Scottish economy, according to Scottish tourism officials, as thousands of visitors travel to Loch Ness and Drumnadrochit every year to try and catch a glimpse of the famous monster.