do mexican salamanders are survived without water completely during their entire lifetime

Mexican salamanders, including the axolotl (Ambystoma mexicanum), cannot survive their entire lifetime without water. They are amphibians, which means they have a close relationship with water throughout various stages of their life cycle. Here are some reasons why water is essential for their survival:

1. Aquatic Larvae: As with most amphibians, Mexican salamanders begin life as aquatic larvae that hatch from eggs and live in water.

2. Respiration: Salamanders have permeable skin that allows them to absorb oxygen and excrete waste through it. This cutaneous respiration requires a moist environment to function properly.

3. Hydration: Unlike some reptiles, salamanders cannot get all the water they need solely from their food. They require external sources of water or a moist environment to maintain proper hydration levels.

4. Breeding: Salamanders usually return to water to breed and lay their eggs. The eggs need a watery environment to develop and hatch.

5. Thermoregulation: Water bodies help regulate body temperature, which is important for salamanders' metabolic processes.

6. Habitat: Even as adults, many salamanders prefer damp habitats, such as marshes, ponds, or damp forests, where they can find both moisture and suitable hiding spots.

While some salamander species can survive in damp environments for extended periods, they still need access to water at some point in their lives, especially for reproduction. A complete absence of water would be detrimental to their survival.