One-sided Livebearer
NameOne-sided Livebearer
Scientific NameJenynsia multidentata
Common NamesOne-sided Livebearer, Many-toothed Livebearer, Argentine Livebearer
FamilyAnablepidae
OriginSouth America, Paraná-Plata Basin, Argentina, Uruguay, Paraguay, Southern Brazil
Temperamentsemi-aggressive
Dietomnivore
Care Levelintermediate
Minimum Tank Size (Gallons)20
Max Size (Inches)4.5
Water TypeFreshwater
Temperature Range (°F)68-78
pH Range6.5-7.8
Compatible SpeciesLarger Tetras, Rasboras, Corydoras Catfish, Dwarf Cichlids (e.g., Kribensis), Other robust livebearers (e.g., Platies, Mollies)
Description
The One-sided Livebearer is a unique subtropical fish known for its asymmetrical reproductive anatomy, where males can only fertilize females from one side. These hardy fish have a mottled, olive-brown coloration and an upturned mouth, making them interesting inhabitants for a species tank or a robust community aquarium. They are active swimmers and can be territorial, especially males towards each other.
