It reminds me of a 8ft tank i saw that was more of a dirt and sand bottom bu they made a steep hill on one side and actually came out of the water for a fe inches. They were housing crabs and fish together and it was for the crabs to crawl around out of the water a bit. I think I've seen similar turtle tanks, but not usually with fish or they'd be eaten. I always thought that was a really cool cross section but never had a tank long enough to sacrifice the water volume to try it myself.
