A Perth father who survived a shark attack remains in a stable condition after undergoing surgery at Royal Perth Hospital.

Doctors were able to save Robbie Peck's arm in a delicate operation.

His brother-in-law posted a photo showing the father-of-three from sitting up in his hospital bed, giving a thumbs up and smiling.

READ MORE: Activists glue themselves to Picasso painting

"Bonded by blood — literally," he wrote.

It was Clive Fondyke who came to Peck's rescue on Friday, using a makeshift tourniquet to stem his rapid bleeding, as they waited for help.

Peck had been spearfishing with friends at Port Hedland when he was savaged by a suspected bull shark.

His family is by his bedside as he faces a long road to recovery.