FILE - This Oct. 8, 2008 file photo shows a canal in Xochimilco Lake in Mexico City. The salamander-like axolotl, also known as the "water monster" and the "Mexican walking fish,"may have disappeared from its only known natural habitat, Lake Xochimilco. Biologist Luis Zambrano of Mexico’s National Autonomous University said Tuesday, Jan. 28, 2014, the most recent three-month attempt to net axolotls found not one of the creatures. (AP Photo/Dario Lopez-Mills, File)