When I was 9 my father told me the two communitary 20g we had at home would be mine if I could take care of the fish ( 1 year test). they had guppies, mollys, platys and so on.
That was 35 years ago...
Mine was a Killie from a killie trap out of the Newark bay. My older cousins would catch them for bait using stale bread. It lasted a few hours in a jelly jar.
aside from my mums tanks when i was younger inc a 4ft tank with a tiger oscar called oscar surprisingly!-) they first tank i sustained without killing the fish was a female convict that i thought was male and a gold coloured carp, they lived in the 10 gallon for 2-3 years! needless to say the carp didnt grow much and was stunted but i loved em!-)