Our water-loving siblings at Divester posted on this underwater palace earlier. The Jelly-fish 45 is a bit like the Anthenea, a floating home with an underwater viewing area. This one is made of high density fiberglass with with solid teak flooring. It has an underwater lower deck for checking out the view and it's powered by photovoltaic panels. The Jelly-fish 45 has five levels connected by a spiral staircase. There are three levels above sea level, the underwater viewing area and another lower level that has the guest room, bathroom and technical space. If you've got the space, at $2.5 million it's cheaper than some yachts or oceanfront property.