axolotl, definition from Merriam Webster:
Main Entry: ax·o·lotl
Pronunciation: 'ak-s&-"lä-t&l
Function: noun
Etymology: Nahuatl AxOlOtl
Date: circa 1768
: any of several salamanders (genus Ambystoma especially A. mexicanum and A. tigrinum) of mountain lakes of Mexico and the western U.S. that ordinarily live and breed without metamorphosing