Onestriped livebearer (Jenynsia unitaenia), first described by Ghedotti & Weitzman, 1995 is a small fish in the family Anablepidae (order Cyprinodontiformes). Adults typically reach 7.60 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Temperate waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Least Concern.
Dorsal soft rays (total): 10 - 12; Anal soft rays: 9 - 10. With a single midlateral stripe without associated dorsolateral or ventrolateral stripes or blotches; greater than 13 relatively long and slender gill rakers on ventral limb of first gill arch; and a slightly subterminal mouth.: fusiform / normal.
Behavioural data for Onestriped livebearer is currently being reviewed.
Freshwater; benthopelagic. Temperate South America: coastal rivers in Santa Catarina and northeastern Rio Grande do Sul States, Brazil.
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