what is the name of this fish?
Looks like Jewel Fish, a cichlid that has been kept for a long time. Hemichromus bimaculatus , native to west Africa a bit different from "African Cichlids" which are from east Africa. Source : Exotic Aquarium Fishes by W. T. Innes ( the guy neon tetras are named after), 1937 ; But I don't think you can find it online .