The massacooraman is a huge, hairy, man-like creature that lives in rivers in the interior of Guyana. The massacooramaan allegedly capsizes small boats and eats the occupants.
Amerindians and miners who work in the interior of Guyana often speak of the massacooramaan. It is much taller and bigger than a man, and has sharp teeth. It is unknown whether or not the massacooramaan lives in the river or dwells on land, but it is certain that it can swim very well and attacks boats in the river at whatever chance it gets.
A study into jumbies by Rustom Seegopaul (via caribbeancivilisation)