I used to have fish.
I had a Plecostamus, a cory cat, a gurami, an irridesent shark (it was really just a fish, not a shark...), a crab, an algae eater, and a handful of neon tetras. The crab and gurami went to work on the tetras. The shark got ich and died, the crab crawled out of the tank, fell off my dresser, and died. The cory cat... disappeared... The gurami got old and died. And the plecostamus, well, he outgrew my ten gallon (7 inches!) so we put him in with my brother's dinner plate sized oscars...
Eventually he got sick and the oscars finished him off.
-Tsuji