Here is a list of mythical creatures beginning with this letter and I am constantly gathering information from each continent and continually updating.
Ahuizotl (Aztec)
The ahuizotl (from the Classical Nahuatl: ahuitzotl for "spiny aquatic thing", a.k.a. "water dog") is a legendary creature in Aztec mythology. It is said to lure people to their deaths. The creature was taken as a mascot by the ruler of the same name, and was said to be a "friend of the rain gods".
It is described as being the size of a small dog, with waterproof fur. Its name comes from the propensity of its fur to spike when it leaves the water.[citation needed] The ahuizotl has hands similar to a monkey's, which are capable of manipulation, both on its arms and on its tail.