Jeff Bezos, girlfriend Lauren Sanchez show off new $500m superyacht

Jeff Bezos and girlfriend Lauren Sanchez have been spotted showing off his brand new superyacht with room for 18 guests.

Jeff Bezos and his girlfriend Lauren Sanchez have taken to the water to show off his brand new, half-a-billion dollar superyacht.

The swimwear-clad couple were snapped relaxing on the deck of the $US500 million ($A751 million) ship, as they sailed off the coast of Spain on Monday afternoon.

Sanchez, 53, a former Fox News media personality, wore a pink bikini and white cover-up as she padded across the deck, while Bezos donned pale blue board shorts and a cream jacket.

The couple was spotted enjoying the massive vessel. Picture: Cobra Dunes / Backgrid.

The ship, which boasts a helipad and pool, can accommodate up to 18 guests, but the couple was spotted sailing solo.

Construction on the vessel, named Koru, began in 2018 after Bezos put down half a billion dollars to acquire it. It is considered the tallest sailing yacht in the world at 70m.

Bezos bought the controversial ship in 2018. Picture: Cobra Dunes / Backgrid.

Sanchez and Bezos relaxed on the superyacht off the coast of Mallorca, Spain. Picture: Cobra Dunes / Backgrid.

The Amazon founder’s mega-boat created controversy last year after a report that Dutch officials would have to dismantle the historic Koningshaven Bridge to allow the huge vessel to pass through.

The plan was ditched after uproar from residents, who threatened to egg the yacht and its billionaire owner, and Koru was towed away from its construction location to another shipyard without its masts.

The move was reportedly made under the cover of darkness. Koru was finally completed in March 2023.

The superyacht costs about $US25 million ($A37 million) a year to run, but it is not the only toy belonging to Bezos. The billionaire also owns a fleet of helicopters, private planes and multimillion dollar properties.