Why is it difficult to classify an axolotl?

Classifying an axolotl can be challenging due to its unique characteristics that blur the lines between amphibians and reptiles. As a neotenic salamander, the axolotl retains larval features throughout its life, such as external gills and an aquatic lifestyle, which complicates its classification among typical amphibians. Additionally, it has a distinct genetic makeup and evolutionary history, making it difficult to categorize within the broader taxonomy of salamanders. These factors contribute to ongoing debates among scientists about its precise classification.