Unique about Oceanic aquariums is that they come in all shapes and sizes to fit any home's space requirements. You can get them in corner models, bow front models, hexagonal and pentagonal.
Not only that, but you can purchase premade "package reef aquariums" that are already set up for a marine reef environment. Considering the work involved with starting a reef aquarium, that's a pretty cool feature.
There are two basic makers of Oceanic Aquariums on the internet: All-Glass and Oceanic Aquariums. Both offer great service and replacement options. They don't sell these aquariums directly, however, rather will refer you to an independent supplier or your local pet store. Such suppliers can be found on both of their websites. Your local pet store is the quickest and most practial option. Just be sure you're ready to deal with all that weight!

Other than the pet store, you might try looking on Ebay or check your local aquarium attraction for deals on such large aquariums, perhaps on used aquariums. If they can't sell you one, they're sure to have connections or advice on how to get one. Again, be prepared to pay significant shipping costs if it comes to that.

Feel free to check out the resources on this page for more oceanic aquarium info and tanks. Good luck!

In The Spotlight: Aqueon 125 Gallon Black Trim Tank

The All-Glass standard size aquarium is made with care to assure that it can stand up to almost any application. These aquariums come in a wide range of sizes as well as black and oak trim styles. Large aquariums feature one-piece center-braced frames that eliminate glass bowing. Size 72 x 18 x 22 Furniture Options: Classic Pine Stands and Canopies Cabinet Stands Modern Series Stands and Canopies Classic Mission Series Stands and Canopies Home Impressions Elements KD Double Wood