What is "mbielu-mbielu-mbielu"

The Mbielu-Mbielu-Mbielu is a cryptid reported from the Likouala Region of the Republic of the Congo. Only a few claimed sightings have been reported, at the villages of Bounila and Ebolo, which were collected by the cryptozoologist Roy Mackal. No physical evidence for the creature exists.

Apparently herbivorous, it is described as "the animal with planks growing out of its back" - which has led some writers on the subject to suggest one of the Stegosauridae, most likely a Kentrosaurus. The animal appears to be aquatic, and has mostly green algal growth covering the "planks".