He told the TEN programme a large stingray pierced Irwin with its tail “hundreds of times”, possibly mistaking his shadow for a shark.
Initially he had not realised the stingray had attacked Irwin.
“He had a two-inch-wide injury over his heart with blood and fluid coming out of it and we had to get him back to the boat as fast as we can,” Lyons said.
“He obviously didn’t know it had punctured his heart … even if we had got him into an emergency ward at that moment we probably we wouldn’t have been able to save him.
“I was saying to him things like ‘think of your kids Steve, hang on, hang on, hang on’, and he calmly looked up at me and said ‘I’m dying’ and that was the last thing he said.”
“We thought he was going to live forever,” says Lyons.
While Lyons was a friend and business partner to Irwin, it’s unclear if Terri Irwin has lent her support to the interview proceeding.
Lyons now has a new documentary E-Motion, which explores how science and alternative medicines are combatting emotional trauma.
Footage of the Irwin attack has never been released.
“I don’t know what’s happened to it, but hopefully it will never see the light of day.”