119657
For instance , how new species come about , how the axolotl never needs to mature , how hard it is to classify animals , and why our fish-like ancestors moved to the land .
 axolotl
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 axolotl