My very first job was in a pet store when I was 14. I got to take care of 40 fish tanks, so I learned a lot about fish that way. But that was in Germany, so I only know the fish by their German name lol.
My favorite ones where the Discus fish...let me see if I can find a picture. They were pretty much the only ones I did not manage to breed:
I don't have any fish at the moment, no time or room for a tank, but if I ever have the money and time, I want a saltwater tank! Those are the most colorful fish ever!