[@Rin] Its called an Ahuitzotl it is from Aztec and Mayan Mythology. Said to look like a small dog, the Ahuitzotl had streaks on its head, small ears, and a hand at the tip of it's tail. And according to legend it would submerge itself in a lake or stream and begin to wail like a small child or a frightened woman. A passerby would hear the sound and would rush to the rescue of the "helpless victim".

Upon approaching the water the victim would be strangled by the creature's infamous tail-hand and then the creature would tear out the victim's eyes, nails and teeth and eat them. It would then toss the lifeless body onto the riverbank and restart its wailing.