In Algonquian mythology, what is the name of the underwater panther?

In Algonquian mythology, the underwater panther is called Mishipeshu. The name is associated especially with Anishinaabe, including Ojibwe, Odawa, and Potawatomi traditions, where the creature is a powerful being of lakes and rivers. It is commonly described as a giant feline with scales, horns, and spikes along its back and tail.

Mishipeshu is often linked with Lake Superior, particularly Michipicoten Island, and is said to guard underwater copper deposits. Stories warn that taking copper from its domain could bring disaster. The creature’s power is frequently presented as an underwater counterpart to the Thunderbird, whose domain is the sky; their opposition reflects a broader balance between water and air.

Spellings vary because the name comes through different Indigenous languages and historical transcriptions. Forms such as Mishibizhiw, Mishipizhiw, Mishepishu, and Mishibijiw are also found. Piasa is a separate legendary figure, while Uktena belongs primarily to Cherokee and related serpent traditions, so neither is the standard answer here.