Onesided livebearer

Onesided livebearer
Rio de la Plata onesided livebearer (Jenynsia multidentata).
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Anablepidae
Subfamily: Anablepinae
Genus: Jenynsia
Günther, 1866
Type species
Lebias lineata
Jenyns, 1842
Species

15, see text.

Jenynsia is a genus of freshwater fishes in the family Anablepidae. Like Anableps species, they are onesided livebearers: some sources indicate that they only mate on one side, right-"handed" males with left-"handed" females and vice versa. However, other sources dispute this. These South American fish are viviparous.