A number of hoax attempts have been made, some of which were successful. Other hoaxes were revealed rather quickly by the perpetrators or exposed after diligent research. A few examples follow.
In August 1933, Italian journalist Francesco Gasparini submitted what he said was the first news article on the Loch Ness Monster. In 1959, he reported sighting a "strange fish" and fabricated eyewitness accounts: "I had the inspiration to get hold of the item about the strange fish. The idea of the monster had never dawned on me, but then I noted that the strange fish would not yield a long article, and I decided to promote the imaginary being to the rank of monster without further ado."
In the 1930s, big-game hunter Marmaduke Wetherell went to Loch Ness to look for the monster. Wetherell claimed to have found footprints, but when casts of the footprints were sent to scientists for analysis they turned out to be from a hippopotamus; a prankster had used a hippopotamus-foot umbrella stand.
In 1972 a team of zoologists from Yorkshire's Flamingo Park Zoo, searching for the monster, discovered a large body floating in the water. The corpse, 4.9 - 5.4 m (16 - 18 ft) long and weighing as much as 1.5 tonnes, was described by the Press Association as having "a bear's head and a brown scaly body with clawlike fins." The creature was placed in a van to be carried away for testing, but police seized the cadaver under an act of parliament prohibiting the removal of "unidentified creatures" from Loch Ness. It was later revealed that Flamingo Park education officer John Shields shaved the whiskers and otherwise disfigured a bull elephant seal which had died the week before and dumped it in Loch Ness to dupe his colleagues. On 2 July 2003, Gerald McSorely discovered a fossil, supposedly from the creature, when he tripped and fell into the loch. After examination, it was clear that the fossil had been planted.
Cryptoclidus model used in the Five TV programme, Loch Ness Monster: The Ultimate Experiment In 2004 a Five TV documentary team, using cinematic special-effects experts, tried to convince people that there was something in the loch. They constructed an animatronic model of a plesiosaur, calling it "Lucy." Despite setbacks (including Lucy falling to the bottom of the loch), about 600 sightings were reported where she was placed.
In 2005, two students claimed to have found a large tooth embedded in the body of a deer on the loch shore. They publicised the find, setting up a website, but expert analysis soon revealed that the "tooth" was the antler of a muntjac. The tooth was a publicity stunt to promote a horror novel by Steve Alten, The Loch.