I had two 55 gallon fish tanks set up at the last place I lived. One was a nice little community of fishies with lots of live plants. They were the usual community fish; tetras, barbs, rasboras(sp?). Sometimes I put some ghost shrimp in so they would eat the nasties on the bottom, but they always got eaten before they could do any real work. Freaking slacker ghost shrimp.
The other tank had two goldfish.
Man, I loved those goldfish. I got them at Walmart for $.26 each and they were an inch long. Two years later, they were gigantic 10" beasts. You couldn't fit your hands around them they were so huge.
When we moved I gave the goldfish to a guy with an outdoor pond (a big one). He already had some koi in there, and he said they were pretty big, but when we put the goldfish in the pond, they just dwarfed the koi. It was like putting fishie-godzilla's in the pond; all the koi went running away from the giants.
Dam I miss those guys...
An additional odd ball thought - if you had fish that could live and grow in a tank filled with beer, and if you ate the fish, would it be like eating beer-marinated fish?
Would the fish always be druk? Would they swim sideways or upside down? What does a dizzy drunk fish look like?
Do you think the beer would the beer turn skunky after a while?