AS he sat in his kayak on the Fitzroy River, struggling to reel in his fishing line, Andrew Miller thought he was setting the record for the world's biggest barramundi.
But after 15 minutes of fighting, he discovered a "six foot" (1.8m) bull shark on the end of his 20-pound line.
The Rockhampton man said he'd caught three sharks in the Fitzroy in the last month, and he estimated this first one was the same size as his kayak.
"He had a crack at the side of the kayak … but he was pretty worn out," he said.
"The last one I caught hit under the kayak twice, it gave me a bit of a bump and a fright.
"It's an absolute blast, it's an adrenaline rush catching a shark."
He may have lost his lure in the process, but he gained a video which is now available on The Morning Bulletin's website.
The shark in the video was captured in the river near the railway bridge in the late afternoon.
"The rod is only about three foot and a half foot … so I was fighting this bugger on a tiny rod and only on a 20-pound line.
"I just spent ages fighting … they've got a lot of energy.
"Now I know what they're like, I just bring them up and release them."
But Andrew said he's not worried about sharks - it's the thought of crocodiles lurking around the corner that were "a kayaker's worst nightmare".
He has been a keen fisherman for years but only started fishing in his kayak about six months ago, and said it's been great for his fitness.
The barramundi fishing season is now over, but fishermen are still able to fish for other species.