name: axolotl (ambystoma mexicanum) max size: up to 12 inches water parameters: pH 6.5-8.0, temperature 60-68°F, cool freshwater with low flow diet: carnivorous – feeds on earthworms, nightcrawlers, bloodworms, sinking carnivore pellets, and soft meaty foods; juveniles eat more frequently than adults temperament: peaceful and solitary; should not be housed with fish or aggressive tank mates tank setup: species-only aquarium with a smooth bare bottom or fine sand; provide hides such as caves or PVC; gentle filtration with minimal current is essential compatibility: best kept alone or with other axolotls of similar size; avoid fish, shrimp, or gravel that can be swallowed behavior: slow-moving and curious; spends most of its time walking along the bottom rather than swimming fun fact: axolotls can regenerate entire limbs, parts of their heart, spinal cord, and even portions of their brain, making them one of the most fascinating animals studied by scientists