Fin's Fish Guide
The Onesided livebearer (Jenynsia lineata) is a brackish-water fish of the family Anablepidae that grows up to 8 cm.
Description
The onesided livebearer is a small livebearer from southeastern South America, in fresh and brackish water of Argentina, Uruguay and southern Brazil. The species grows to about 8 cm and has a slender, silvery body, sometimes with a row of spots. The name refers to its peculiar reproduction: at mating the male organ can move only to the left or right and fits only females with the opposite orientation. Females give birth to live young. The fish is harmless to humans and is assessed as Least Concern (LC) by the IUCN.
Frequently asked questions
How do you recognise the Onesided livebearer?
The Onesided livebearer has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Ovoviviparous; left- or right-handed mating anatomy (one-sided)
Where does the Onesided livebearer live?
The Onesided livebearer lives in brackish water and is mostly found around mixed bottom. Southeastern South America
How big does the Onesided livebearer get?
The Onesided livebearer grows to a maximum of about 8 cm.
Is the Onesided livebearer dangerous to humans?
No, the Onesided livebearer is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Onesided livebearer edible?
The Onesided livebearer is not usually eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Jenynsia
More from the family Anablepidae
Want the complete picture on the Onesided livebearer?
Point your camera at the fish and Fin names the species in seconds. Free, and the Onesided livebearer is one of 12,519 species in the app.