Florida wildlife officials are investigating a video posted to Facebook last year that shows a man jumping into a body of water…right on top of a manatee which was swimming with another of its kind. Investigators believe they are a mother and calf.

The man can be heard laughing with his friends–who apparently baited the manatees by running fresh water from a hose–right before he jumps onto the creatures. The men could face a $25,000 fine for violating the Florida Manatee Sanctuary Act, a misdemeanor.

“It’s sad,” FWC Officer Lenny Salberg said. “Here you have a manatee just swimming down a canal not hurting anyone. To actually go out of your way to harm them, what would make you want to do that?”