probably already been suggested,but it would be great if the fish swam at you in the tank,and came right up to the glass.
They do swim in lots of different directions but never really coming straight at you.
love the lion fish,how about a jellyfish trailing its tentacles,nudibranchs on the coral,(which is moving in the current),like the idea of blue ringed octopus,pufferfish
anyway this is the best......worth every cent
cheers
john