Axolotl by Рrot
Axolotls are a species of salamander than go through the process of neoteny, which means they retain juvenile traits through adulthood. In this case, the axolotl never metamorphoses into a terrestrial adult, instead remaining aquatic and breathing through gills during its entire life. In the wild they are found only in a single lake in Mexico that is threatened with increasing pollution, but they are often kept as pets and research subjecs due to their regenerative abilties and relevance to the field of genetics.