This species has not been found since 1963 and is considered extinct.

Males are slightly larger than females reaching up to 3.4 cm in length.

Ref:
1965: Oryzias madagascarieunsis Arnoult Redescribed and Assigned to the East African Fish Genus Pantanodon (Atheriniformes, Cyprinodontoidei) BY DONN ERIC ROSEN
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Copyright 2022
Richard J. Sexton