This is going to sound terrible but it is another/different option. You can seal the fish in a bag, freeze it and take it into a taxidermist (spelling) they can clean it and preserve the skeleton and make it into an ornament that you can display. A while back there were a few people asking for dead fish in the marketplace to do this very thing. I personaly put large fish in bags and go the trash route but have always wanted to try this route as well. Seems like a unique way to preserve what your fish meant to you.
Hells yes. I just hacked the head off the SA lungfish I've got in my freezer and skeletonized it. Man the dental plates are awesome. Whenever something croaked, be it lizard, turtle, fish, etc, I'll typically attempt to get at least some part of it for display in the "bone box". After 10 years working in LFS I've got quite the collection of fish skulls, jawbones, dried inverts, scales, etc...
