It took two men to pull this 1.8m beast out of the Collie River when they hooked the 60kg bull shark last month.
One of the fishermen, who asked not to be named fearing retribution for killing a shark, said he believed there were “a lot” of sharks in the river.
“A mate got another one about a fortnight ago,” he said.
The Cowaramup man had heard the spot was good for shark fishing but never expected to catch such a huge specimen.
“I was told it is well-known there are bull sharks in the river and have been for more than 50 years, ” he said.
The bull shark was caught near the Eaton Scout Camp on January 10 and the fisherman said passers-by could not believe their eyes.
A photograph of the shark was posted online, attracting more than 500 comments from people debating if the picture was real.
Speaking to the Times, the man who caught the shark said the animal had put up a good fight but after getting a rope around its tail, he and a friend were able to pull it out of the water.
“Another mate had his line spooled-off his reel, ” he said.
He said the shark was good eating and he had stored leftovers in the freezer.
Bull sharks are widespread coastal and freshwater sharks that inhabit shallow waters in bays, estuaries, rivers and lakes.
On January 9 an unknown species of shark was sighted near the Ridley Place boat ramp in the Leschenault Estuary in Australind.
In 2010 a spate of shark sightings in the Collie River and estuary prompted the Department of Fisheries to issue a warning for water users to be cautious.
In the same year a one-metre bull shark was caught in the Collie River.
In 2002 a 32-year-old man was attacked by a shark while swimming in the river.
He required 21 stitches after he was attacked from underneath while swimming about 500m upstream of the Eastwell Road boat ramp.