This jaw-dropping $600m concept for a mega-yacht has been inspired by a shark. The 501ft long & 112ft wide 'Prodigium' features fin-like structures and windows that echo the toothy grin of the marine predator. The vessel, designed by Lazzarini Design Studio, is spread over six levels. It also takes inspiration from roman architecture. A spokesperson says: “construction would take about 28 months in one of the most bravest shipyard of the world."