It's the story about the one that got away no beachgoer wants to hear – a 1.5 metre bull shark was reportedly chased onto the sands of Noosa's Main Beach by a bigger shark early on Friday morning.

Surf Lifesaving Queensland regional manager Aaron Purchase said members of the public noticed the hefty creature near the tidemark just after 7am.

The shark carcass found on Noosa Main Beach. Credit:Andy Raymond

Mr Purchase said lifeguards who began their shift at 7.30am were alerted by a small crowd of stunned onlookers out enjoying the waning hours of the Easter school holidays.

“It's the last thing you expect to see,” he said.