Here's a good overview of the tank. That "root" thing on the left, we saw it and simply had to have it. Not only is it just cool, it looks like some tentacled sea monster if you look at it right.
Swimming amongst the ruins of our own little R'lyeh are two of our new little finned horrors. The five of them have been given the monikers "The Four Horsemen, plus Bob, the Horseman Nobody Loved"
I'll end up putting a backdrop on the tank, as soon as I find an appropriate one.