Killi
ENCYCLOQUARIA . SCIENCE
The Art and Science of Aquaria
Evolution in Fishes


By 250mya there were around 1200 species of fish. Between then and now around 27,000 species of fish evolved.
This chart shows the ages of the rise of fishes. Nearly all aquarium fish are the bony fishes on the far right.

cichlid

Evolution of Cichlids


killifish

Evolution of Killifish.