A strange video circulating online shows a mysterious creature suddenly emerge from the waters of the Amazon River to menace a kayaker. The odd footage reportedly popped up on social media earlier this week, although the circumstances surrounding the unsettling incident were unspecified. In the video, which has gone viral in South America, a sizeable creature can be seen swimming up to the kayaker and then creating an enormous disturbance in the water next to the boat.

To his credit, the kayaker manages to contain his compose as the eerie event unfolds and somehow does not wind up falling into the water due to the turbulent conditions. Strangely, after the creature causes the commotion near the boat, several other strange disturbances can be seen in the river off in the distance. As for what the animal could have been, viewers online have suggested an array of possible suspects, including a freshwater dolphin, an inordinately large catfish, or a manatee.