Celestial pearl danio (Danio margaritatus)

The celestial pearl danio, Danio margaritatus, was discovered in 2006 in a spring-fed pool in Shan State, Myanmar, and caused a sensation. Myanmar banned exports in 2007. It reaches about 2 cm.

It was first bred in the UK within weeks of arriving. It scatters around 30 eggs that hatch in about three days. Heavy commercial breeding has led to deformities, so well-bred stock is worth seeking. Keep it at 20–26 °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) · 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) · Boraras brigittae (mosquito rasbora).

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