Fishermen seen in a social media video laughingly luring a crocodile to their boat could be fined for harassing specially-protected wildlife.
Department of Parks and Wildlife district wildlife officer Peter Carstairs is investigating the incident.
"We will be following up with the men to try and get further explanation of what they did and why they did it," Mr Carstairs said.
The video shows the men using a fishing rod and lure to entice the crocodile close to the stern of their motor boat.
"You can see in the footage that they cast the lure back out to the crocodile to deliberately lure it in to the boat," Mr Carstairs said.
"It's very stupid behaviour in my opinion."
Two local Broome fishermen, Mathew Bennett and Lee Carter, had a close encounter with another local resident yesterday whilst fishing near Crab Creek, south of Broome.