I wouldn't be surprised to see this in the Neiman Marcus Christmas Catalog.
It's the Jelly-fish 45, a 6 person floating "house." The bottom of the 5 levels is underwater, giving you a living room with a 360° view of the sea life. Yours, for only $2.5 million.
I'm not really sure how the legalities work about parking your house, but when they start having undersea trailer parks, sign me up!