i really hate to do this, i swear, i really do. but here goes...
i think the worst damage that fish has suffered is the fact that it is caged and on display in the first place. kill it and stuff it if you want to, (that would be my choice) or release it. taking the biggest crappie the world has ever seen and putting it in a small tank (compared to the pond it lived in) is just torture to something that should be respected. say all you want about "it's a fish, it doesn't have feelings", but the oldest part of your brain, the part almost every creature has is what drives us to leave our homes and fish and hike in new areas and that fish has it also. sure, it is neat to see, but i could see it if it was stuffed also. i had the same problem with the WR catfish that came out of the mississippi a few years ago. so label me a treehugging hippy(i'm a city forester) if you want, but i swear i don't like patchouili and i kill many things. i just try not to torture too many things if it can be avoided.
now, if they were to keep it caged to breed it, like the lunker bass program in texas, then that would be understandable. they aren't doing that though, they are using it to sell more bamswizzles and widgets, to quote "The Grinch".
"We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect"
-Aldo Leopold