
Xiphophorus signum
Poeciliidae, Poeciliinae

Poeciliidae, Poeciliinae
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Inhabits fast-flowing waters that are usually densely vegetated and have a temperature of 25°C. Occasionally occurs with the livebearer Scolichthys iota. Males attain a body length up to 7.5 cm plus 3 to 4 cm for the sword.
Hard, alkaline water, sand and rock: an aquarium from the rivers and lakes of Mexico and Central America, with cichlids and livebearers.
From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.
Why new fish should live in a tank of their own for a few weeks before they move in, what you need, and what to look for.
The most common disease in aquarium fish. How to recognize it, why it shows up, and how to get rid of it.