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Endler's livebearer (pure strain)

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Endler's livebearer, Poecilia wingei, comes from a few lagoons in north-eastern Venezuela and was formally described in 2005. Males are only about 2.5 cm. The IUCN listed it as Endangered in 2024, and one wild population is thought to be extinct.

It crosses freely with guppies and the offspring are fertile, so pure stock is scarce; hobbyists label documented pure lines "N-class". It's prolific, with broods of 5–25 every 23–24 days, and likes warm, hard water: 24–30 °C, pH 7.0–8.5. See our guide to keeping tropical fish through a New England winter.

Part of our Rare aquarium fish. Also: Apistogramma cacatuoides (cockatoo dwarf cichlid) · Apistogramma agassizii · Apistogramma macmasteri · Nothobranchius rachovii (bluefin killifish) · Aphyosemion australe (lyretail killifish) · Fundulopanchax gardneri (steel-blue killifish) · Corydoras sterbai (Sterba's cory) · Corydoras adolfoi (Adolfo's cory) · Pseudomugil gertrudae (spotted blue-eye) · Betta macrostoma (Brunei beauty) · Scarlet badis (Dario dario) · Celestial pearl danio (Danio margaritatus) · Boraras brigittae (mosquito rasbora).