Several of the show’s celebrities were left quaking after they watched the film.
Gyles revealed it was the first time he’d seen the Steven Spielberg classic.
He said: “I’ve never seen, this is going to be Jaws.
“I’ve never seen Jaws. I know it’s about a whale.”
His exasperated co-star Maureen Lipman then replied: “It’s not about a whale, it’s about a shark.”
Later on, Maureen explained the film had quite an impact on her when she was younger.
She said: “The sea was never the same again. I would never, ever go out further than I could stand.”
Celebrity Gogglebox airs on Fridays at 9pm on Channel 4.