Let's see.. One end "drops off" deeper than the other end.. Call me crazy, but I'd call it a "Drop Off" tank.. I've never owned a saltwater tank and I could tell what it is.. LOL.. I wish we could work a deal! My wife doesn't think I'll get one.. Can't wait to see the look on her face when I do..Cant count how many have asked " what kind of tank is that " LOL