When I was a young girl we had goldfish that we kept in a tub outside. They were beautiful goldfish. Just out of town, there was an area that ad two ponds, and in the ponds were goldfish. I have no idea who had started them there, but pretty much they were the only fish in the ponds. We would go out and fish, and when we caught a really pretty fish, we brought it home. The fish were about 6-7" long, so they were a nice size, and I loved watching them, and feeding them.
Later, my other had fish tanks inside, and she raised guppies, and had a variety of tropical fish in the tanks. I don't remember all of them, but my favorites were the angel fish, the gourami, and the koli loach, who was like a cross between a catfish and an eel, and would hide under the greenery in the bottom of the tank, and then come rushing out
We always enjoyed watching the fish, and the aquarium was so beautiful.