Damien Hirst shark that sold for about $8m is fourth 2017 work dated to 1990s | Damien Hirst

A Damien Hirst shark preserved in formaldehyde that was purchased by American billionaires was dated to the 1990s even though it was not made until 2017.

The 4-metre (13ft) tiger shark, dissected into three parts, is the centrepiece of a luxury bar in the Palms casino resort in Las Vegas. It first appeared in the casino six years ago, with the title: The Unknown (Explored, Explained, Exploded), 1999.

However, an investigation by the Guardian has established that it was made in 2017, almost two decades after the date publicly ascribed to the work. The sculpture was bought by the billionaire…