do mexican salamanders never need any water to survive at everytime in their whole lifetime

Mexican salamanders, like all amphibians, do require water for various stages of their life cycle. In fact, many species of salamanders lay their eggs in water and the eggs develop in an aquatic environment until they hatch. Even as adults, they often prefer damp environments and are found in areas with high humidity.

However, some salamander species, including those from Mexico, can survive in environments with less water than others, such as moist soil or leaf litter. They can absorb moisture through their skin, which allows them to stay hydrated without needing to be fully submerged in water.

It's also worth noting that the Axolotl, a type of salamander that is native to Mexico, is completely aquatic as an adult and requires water to survive. It is an example of a salamander that cannot live without access to water throughout its entire life.

So, while some Mexican salamanders may be adapted to drier environments than others, none of them are truly able to survive without any access to water at any time during their lifetime. Water plays a crucial role in their development, reproduction, and overall survival.