Pseudomugil gertrudae (spotted blue-eye)

The spotted blue-eye, Pseudomugil gertrudae, comes from northern Australia, Papua New Guinea and the Aru Islands. Males are under 4 cm. Wild fish are uncommon in the hobby, and most are tank-bred.

It scatters eggs and eats them, so collect them or use dense moss. Eggs hatch in about 10 days and the fry need very fine food. Keep it at 21–28 °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) · Betta macrostoma (Brunei beauty) · Scarlet badis (Dario dario) · Celestial pearl danio (Danio margaritatus) · Boraras brigittae (mosquito rasbora).

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