Goldfish are a type of carp, so I'm sure they're just as un-tasty as the carp in the wild -- which, around here, we use quite frequently for garden fertilizer.
In an aquarium -- ooh, that's a tough one! I'm a bona fide, certified fish nut, and have bred hundreds of different fish species and loved them all. Got to love the goldies too, especially ryukins and pearlscales, but also a huge fan of gouramis, endlers, and several different types of cichlids. That's leaving out too many...can I just have them all?
I love tropical fish, but particularly neon tetras, because the tank light catches their colours and they seem to glow. Mine are rather pot-bellied at the moment - maybe there will be some 'glow-ettes' soon Cheers, Louise.