My aquavim piano wave came with a black vinyl covering over the back glass. At first I was ****** because I wanted it viewable from both sides, but it's against a partial wall and only viewable from the landing of the steps, so one would look up and see all the cords and stuff before seeing the tank. I actually ended up drapping black fabric (very decorative) over the back of the tank to cover the cords and stuff from the lights, etc. So, and with the back covering, I'm not sure coraline will grow or if it does how visible it will be.. I also have a really tough time getting to the back to clean the glass, so, this is much better for me. :)