.... "expert" in comparison to... erm... well, I spent ages researching discus before getting them, but've had them only a few months now. Doesn't count as expert, but is probably the more interesting fish I know a bit about.
I wouldn't consider my self as an expert on a certain fish but I know the basics and alittle more on most tetras, angels, bettas, and the basics about common plecos.
I'm not an expert in anything. I've bred kribs for a few years and sold them to a LFS, but that's the equivalent to breeding guppies in the cichlid world and doesn't count for much.
I know about the plants and fish that I currently keep and have kept in the past, but I wouldn't call myself an expert, and I've been in the hobby for a while.
not an expert by any means but i do seem to know a little bit about tiger barb behaviour, problems & habits etc....prob cos i just love spending hours watching our little gang!
I don't feel like I'm an expert of any fish. I kept red tailed loaches for 7 years and they are now in a friend's tank. But I still wouldn't say I'm an expert; I just have experiences.