"" were said to live in the deepest parts of lakes and rivers, where they can cause storms. Some traditions believed the underwater panthers to be helpful, protective creatures, but more often they were viewed as malevolent beasts that brought death and misfortune. They often need to be placated for safe passage across a lake. As late as the 1950s, the Prairie Band of Potawatomi Indians performed a traditional ceremony to placate the Underworld Panther and maintain balance with the Thunderbird.