A Perth motorist has been filmed driving with a shark strapped to the front of their 4WD in Safety Bay near Rockingham, with the video proving a hit on social media.

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The video was posted to Facebook by Julie Wright and shared on the Perth & WA Fishing Reports page on Monday afternoon.

Ms Wright said she "had to look twice" when she saw the vehicle travelling along the road towing a boat with the animal attached to its bullbar.

Six hours after it was put up on Facebook, the video had been viewed more than 200,000 times.

It is unclear what species the shark was, although some who commented on the video said it looked like a tiger shark.

The Department of Fisheries (DoF) has been contacted for comment.

The DOF's website said there was a maximum size limit for tiger sharks caught recreationally off Perth and in other parts of the West Coast bioregion.

"The 'inter-dorsal fin' measurement must be no more than 700mm measured from the front of the dorsal fin on the top of the shark to the back of the smaller rear dorsal fin," the website said.