AI rendition based on witness descriptions, not an actual photo.
A ringed caecilian, one real animal suggested as the source of minhocão stories (not the creature itself) · Free Public Domain Illustrations by rawpixel · CC BY 2.0 (via Wikimedia Commons) · Image source · License
A huge worm or fish of Brazilian folklore, 20–50 m long.
FolkloreVerdict: We treat Minhocão as folklore: the record is stories and local reports, with no specimen or verified photo.