The expensive mega yacht disappeared under the waves This is the moment a huge and expensive superyacht sank off the Italian coast at the weekend. The Italian coast guard had to be called in to coordinate the rescue of passengers and crew from the 40-meter (131-foot) luxury yacht after it began to sink in the Ionian Sea. Terrifying footage shows how the boat slipped beneath the waves. Four passengers and five crew had to be rescued from the sinking vessel. Credit: Guardia Costiera He came hard about 15 kilometers (nine miles) off the coast of Catanzaro, on his way from Gallipoli to Milazzo. All four passengers and five crew members were rescued safely, but worsening weather conditions made it impossible to tow the ship to port, the Coast Guard said. It remains unclear why the ship sank, and the Coast Guard said an investigation is underway. Want a quick and special update on the biggest news? Listen to our latest podcasts to find out what you need to know…