It's called Axolotl my dear Sir. Indeed it is, as are all salamanders *wink* Also, if you were about to cut off his limbs they would grow back to full lenght in no time.
They're native in some lakes in Mexico, seem to be critically endagered though. Not sure if it would be allowed to "catch" one. But then again you're a chaos sorcerer, so f*** da police I guess.