When will people learn that if you decide to do something stupid, it might not be such a great idea to shoot video of said stupid act. Or at the very least, don’t post it online. But then, that’s what keeps YouTube running, right?

This video, recorded in a Cocoa Beach, Florida, neighborhood, shows three men harassing a manatee and its calf–with one of the men cannonballing onto the animals as they swim in a canal.

They thought it was good fun, but the Florida Fish and Wildlife Conservation Commission and the U.S. Fish and Wildlife Service are investigating and plan to file federal harassment charges against the pranksters–which could result in $50,000 in fines and a year in the can for each man.

Read more from the Orlando Sentinel.