The Mexican salamander is a species of amphibian in the family Salamandridae. Bare skin without scales; Both limbs and feet are short; Without vocal cords, unable to produce vocalizations; There are six external gill whiskers on both sides of the head, so it is also called a hexagonal dinosaur. The Mexican blunt mouthed salamander is distributed in central Mexico and is an endemic species of Mexico, famous for its unique appearance and juvenile continuation. The Mexican salamander is classified as critically endangered (CR) on the IUCN Red List of Threatened Species. In China, it is legal to buy and sell artificially bred Mexican salamanders as pets, but it is not allowed to buy and sell wild Mexican salamanders.