A New Zealand man has been fined over a social media video in which he tries to “body slam” an orca swimming next to his boat, in what officials called “stupid” and “extremely irresponsible” behavior.

In a video the Department of Conservation says was shared to Instagram in February, the 50-year-old Auckland man, whom authorities did not name, jumped off the boat into waters off the coast of the Auckland suburb of Devonport, where an adult male orca and calf were swimming nearby.