Only three years after a tiger shark severed her left arm, Bethany, 16, in Australia for the Roxy Women's Pro, is blitzing the professional surf scene.
But she took time out from her commitments this week on Phillip Island to offer Zac words of encouragement as he recovered from a white pointer attack that cost him a leg.
Bethany said she drew strength from her faith.
"That's where I got my ability to go back out surfing," she said. "You try to keep positive."
Zac said he planned to hit the waves on a body board at the scene of his attack, Wharton Beach on WA's south coast.
"The attack has happened. I don't think it will happen again. I can't wait to get back - it's a great wave."
Zac, 15, lost his right leg and part of his left calf when the shark attacked him at his local break in December.
His brother, Sam, 26, pulled him from the shark's jaws and swam him to shore before two passers-by took him to hospital. He was later flown to Perth for treatment.
"I remember seeing a tail and a fin after the attack, then I looked down and it registered straight away - my leg was gone," Zac recalled.
He revealed how, three days later, his leg washed up on the beach not far from the attack scene, shocking tourists who found it.
Zac, who has undergone a rigorous rehabilitation program, was discharged from hospital on Thursday and was on the beach the next day.
In the meeting with Bethany, arranged by the Sunday Herald Sun, the surfers talked about surf, sharks and how to overcome the physical and emotional turmoil of losing a limb.
Zac, who has put his plasterer's apprenticeship on hold, believes in the power of "mind over matter".
"It is really about being positive, no negative thoughts - just go for it," he said.
Bethany lost her arm on the north shore of Hawaii's Kauai in 2003 when she was 13.
She heard of Zac's ordeal and "didn't like the idea of someone else having to go through such a gnarly thing".
The champion junior, who has surfed since she was five, said her injury would never douse her passion for the sport.
"It's always going to be there - being in the ocean definitely helps.
"I love surfing and I love competing. I'm just going to do my best to become a pro surfer.
"The adrenalin rush is different from any other sport."
Bethany, ESPN's 2004 Athlete of the Year, was eliminated from the Roxy Pro on Thursday, taking her junior professional world ranking to five. The surfing competition, at Woollamai Beach, ends today.
Bethany's ordeal is to be the subject of a Hollywood film, which will have the same title as her book, Soul Surfer.
Those wanting to help Zac with his rehabilitation can donate to a trust fund: Zachary Charles Golebiowski, Commonwealth Bank, Andrew St, Esperance. Account number Golebiowski 066511-10183580.