Killifish that may look the same but are really very much not, often being from entirely different continents.


cat-lyr
Episemion callipteron and Rivulus lyricauda


cav-agt
Roloffia and a South American Annual

Leptolebias auroguttatus and Scriptaphyosemion cauveti.


fra-goby
A. franzweneri and a goby

The "goby killie" and a real goby have an eerily similar color pattern. Aphyosemion franzweneri and Mugilogobius mertoni.







riv-rol
Rivulus and Roliffia

Rivulus and Scriptaphyosemion.


sjo-tail
Gularis tail

Why do so many killifish have the same tail fin?



str-mah
The Rivulus that mimics an Aphyosemion

Aphyosemion striatum and Rivulus mahadensis.



Homologous Killifish