The axolotl is critically endangered in the wild and maintained almost entirely in captivity, making the welfare of captive populations essential to the species' survival.
Axolotl welfare in captivity varies enormously from excellent zoo care to poor pet trade conditions. As fully aquatic animals, water quality is the primary welfare determinant — incorrect temperature, pH, ammonia, or nitrite levels cause chronic physiological stress, disease, and death. Axolotls are sensitive to temperature extremes; water above 22°C causes heat stress and immune compromise. Their permeable skin absorbs toxins from the water — contaminated tap water can cause rapid deterioration. In the pet trade, axolotls are often kept in inappropriate conditions with wrong temperature, improper tank size, or unsuitable tank mates. Their docile nature and apparent tolerance masks significant suffering from poor water quality. Laboratory axolotls face additional welfare considerations from research procedures including amputations used to study their regenerative biology.