Etymology: Named after Cortez.
Synonyms: Xiphophorus montezumae cortezi
First European import: Germany, 1964, by the Zoological Institute Hamburg.
Description: See picture. In the picture the short 0.5mm tail isn't visible. There's also a variety which posseses a longer tail, 1.2cm.
Can be kept in normal community tanks, although they should not be kept together
with other livebearers, since the fish will cross and I quote Baensch and Riehl,
another true species will become extinct
Temperature: 24-28 degrees.
Feeding: Omnivorous,all food is accepted.
Size: 5 cm.
Breeding: Easy, if the parents are kept well, every 4-5 weeks between 10-30 fry will be born.
Sexual dimorphism: Besides a gonopodium the males also posses a small sword.
Additional: If you can buy these fish from a shop, but there they have been kept together with other livebearers, you should destroy all the fry that's born in the first half year.
Picture references: Pictures: E. Naus.
References:Baensch, H. A., Riehl, R.(1982): Aquarien Atlas I. Mergus Verlag, Melle, Germany.
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