When we first set up the 760g at the shop we had 2 cali horn sharks, 2 smooth hounds and 3 rays.
The trick to keep them from stubbing their noses on flat panel tanks is to draw some pictures on the tank. My daughter had large pictures of algae (kelp) on the ends of the tank and they learned quick that they can't pass it, and would turn around and be on their way.
So we sold 3 of the sharks and a ray to a buddy that keeps them in a 600 and they've been doing just fine.
We still have the cali horn shark in the 760 and he is doing wonderful. They grow to about 5 feet in length as an adult. So yes, one day he will have to go to a larger system because our display is only 10 feet across.
I am NOT by any means saying that anyone should go out and buy a shark just because "they are oh so cool to have".... I'm just saying there are ways of keeping them happy and safe in an unconventional tank.
[video=youtube;ZtAWqGqTc4A]http://www.youtube.com/watch?v=ZtAWqGqTc4A[/video]
~ Margaret
