will mexican salamanders eventually dry out if survive without water completely

Yes, if Mexican salamanders, such as axolotls, are kept without water or a sufficiently moist environment, they will eventually dry out. As amphibians, their survival depends on a moist skin to aid in respiration and maintain hydration. Drying out can have severe consequences, including:

1. Impaired Respiration: Their skin needs to be moist to facilitate the exchange of gases (oxygen and carbon dioxide) between their bodies and the environment.
2. Dehydration: Lack of water can lead to dehydration, which is life-threatening.
3. Skin Damage: Prolonged exposure to dry conditions can cause the skin to crack and become more susceptible to infections.
4. Stress: Being removed from their natural habitat can cause significant stress, which can weaken their immune system and make them more vulnerable to diseases.

To ensure the health and well-being of Mexican salamanders, it's crucial to provide them with:

• A suitable aquatic habitat with clean, well-oxygenated water.
• A substrate that helps maintain moisture levels, such as coconut fiber or a damp moss.
• Proper temperature and humidity controls within their enclosure.
• A balanced diet appropriate for their species.

Always consult with a veterinarian or a specialist in amphibian care if you have concerns about the health of your salamanders.