Jenynsia onca Lucinda, Reis & Quevedo, 2002
Jaguar livebearer
Jenynsia onca
photo by Petersen, P.

Family:  Anablepidae (Four-eyed fishes, onesided livebearers & white-eye), subfamily: Anablepinae
Max. size:  4.5 cm SL (male/unsexed); 3.73 cm SL (female)
Environment:  pelagic; freshwater
Distribution:  South America: tributaries of the lower Rio Uruguai in Brazil and Uruguay.
Diagnosis:  Dorsal soft rays (total): 6-9; Anal soft rays: 10-10; Vertebrae: 30-30. Having a large dorsal convex expansion at subdistal segments of right half of sixth anal-fin ray of adult males; distinct ovoid to circular dark spots confined to ventral half of flank posterior to pelvic fins; spots gradually more circular towards midventral line; predorsal scales 13-14; series of dashes or spots on body arranged in 6-8 irregular horizontal lines, consistent midlateral pattern absent; no swelling between the urogenital opening and anterior base of anal fin in females; no distinct dark rounded spot on the dorsal pectoral-fin base (Ref. 42933).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (124695)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 31.07.02
Modified by: Reyes, Rodolfo B. - 22.02.21

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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