Igopogo

Sources present Igopogo as a modern, localized lake‑monster tradition associated with Lake Simcoe. The creature's name is said to be patterned on Ogopogo (the Lake Okanagan monster) and to echo the title of the 1952 book I Go Pogo; the supplied materials treat Igopogo as a folkloric/cryptozoological coinage rather than as part of documented Indigenous traditional narratives. Early alleged sightings are reported in media and secondary sources (e.g., an 1823 account attributed to settler David Soules), and later reports and investigations (mid‑20th century to late 20th century) figure in its modern circulation.

Descriptions in the sources vary. Several accounts (summarized via secondary sources) describe a long aquatic creature with a long neck that leaves a wake on the water; George M. Eberhart (as cited on Wikipedia) is reported to describe a gray, seal‑like animal 12–70 feet long with a dog‑ or horse‑like face, prominent eyes, gaping mouth, dorsal fins and a fishlike tail. Eyewitness reports differ: an 1823 report describes a long creature leaving a wake and a trail in mud; Wellington Charles (1952) described "a neck like a stovepipe with a face like a boxer dog;" David Luu (1952) described a "huge gray thing" that leaped; while E. J. Delaney (reported in the same corpus) offered an anomalous description of antennae, multiple arms, leg pairs, and feathered gill‑like appendages. The multi‑appendaged account is divergent from the more common seal‑like and long‑neck descriptions.

Reported behaviors are physical and observational rather than explicitly supernatural. Sources document movement behaviors such as leaving a visible wake on the water surface and a trail in mud (1823 account), rising or showing a long neck above water (Wellington Charles), and leaping from the water (David Luu, 1952). A 1983 sonar operator reported a large animal with a long neck on sonar (William W. Skrypetz), though investigators have disputed such interpretations and suggested natural explanations (e.g., schools of fish or known aquatic animals). No sources in the supplied material attribute overt supernatural powers, attacks, or ritual agency to Igopogo.