Nothobranchius rachovii (bluefin killifish)

The bluefin nothobranch, Nothobranchius rachovii, comes from eastern Mozambique, between the lower Pungwe and Zambezi. Males reach about 5.5 cm.

It's an annual: in the wild adults die when their pools dry, and the eggs wait in the mud. In the fishroom the eggs rest 5–7 months at about 21–25 °C before being wetted; fry mature in about three weeks and live 6–12 months. Keep adults at 20–24 °C. 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 · Endler's livebearer (pure strain) · 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).

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