Two fisherman caught a huge bull shark in the Georges River at Revesby on Wednesday - and while the sharks aren't rare in those waters, they said they were surprised by the size of it.

"I had no idea what I was in for," Hassan Alameri told Nine News.

"It was really hard to bring him up on the sand because he was really big,and we had two or three people helping had a massive crowd watching and everything."

Mr Alameri said it took a lot of effort for him and his friend Luke to reel the shark in.