We usually see that from egg caterpillar comes out, butterfly grows out of it and fly away. But in a type of Salamander (an Amphibian) its growth into an adult is hindered and it is stopped in its larval stage itself. This larva starts also to reproduce! This animal is Axolotl (Ambystroma mexicana, Mole Salamander, 'Mexican walking fish,' 'Waterdog').
