do axolotls must be completely live without water for all their lifetime

No, axolotls must not and cannot live completely without water for their entire lifetime. They are fully aquatic creatures that require water to survive:

1. Respiration: Axolotls breathe through gills as larvae and their skin and lungs as adults, but they still need water to properly hydrate their skin for gas exchange.

2. Skin Hydration: Their permeable skin requires moisture to function, which they can only obtain in an aquatic environment.

3. Habitat: Axolotls live in freshwater habitats, such as canals and ponds, where they hunt, feed, and reproduce.

4. Reproduction: Axolotls mate and lay eggs underwater, with the entire reproductive process occurring in an aquatic environment.

5. Health: Living without water would lead to dehydration, skin damage, and other health issues, ultimately resulting in the death of the axolotl.

In summary, axolotls are not equipped to live without water for their entire lives. They thrive and survive in an aquatic environment, and removing them from water for extended periods can be detrimental to their well-being. To ensure the health of axolotls, they should be kept in a proper aquatic habitat.