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Jenynsia onca Lucinda, Reis & Quevedo, 2002 Jaguar livebearer |
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photo by
Petersen, P. |
| Family: | Anablepidae (Four-eyed fishes, onesided livebearers & white-eye), subfamily: Anablepinae | |||
| Max. size: | 8 cm TL (male/unsexed) | |||
| 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). | |||
| Biology: | Based on photo submitted, this species grow up to 8.0 cm TL and live for up to 7 years in captivity (P. Petersen, pers.comm. 12/2022). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 27 April 2020 Ref. (130435) | |||
| Threat to humans: | harmless | |||