Xiphophorus montezumae

4. December 2020

With the swordtails (Xiphophorus), the males carry a sword-like extension at the low end of the tail fin in many species. This is a luxury structure, that serves the intraspecific communication. Sword-bearing males appear especially sexy on the females and especially intimidating on male conspecifics. The also with primates (the ape-like animals) well known game “who has the longest” always wins Xiphophorus montezumae with the Xiphos. 

We have now once again received a small number of offspring of this magnificent swordtail, which has a comparatively limited distribution area in nature (rivers in the state of San Lous Potosi, on the Atlantic side of Mexico). Since the Montezuma swordtail prefers relatively low temperatures (18-22°) for permanent keeping – it does no harm if the temperatures climb above 24°C in summer – it grows rather slowly. The species is also by far not as productive as for example Green Swordtails (X. hellerii), the litters usually include much less than 20 young. This explains why this beauty will always remain a rarity in the hobby.

For the care it is important that one has to pay attention to constantly good water quality. Generous weekly partial water changes are therefore absolutely necessary. The water should preferably be hard and the pH should be in the slightly alkaline range (8 – 8.5). A good flake food can be the nutritional basis, in addition one feeds frost and live food of all kinds. Regular feeding of Artemia nauplii (also to adult fish, 2-3 times a week) has proved very successful.

For our customers: the fish have code 420143 on our stocklist. Please note that we only supply the wholesale trade.

Text & photos: Frank Schäfer