After two months, Maria Psillakis felt it was time to tell everyone about her husband, Mercury Psillakis, who lost his life following a shark attack in Sydney's Northern Beaches.

She is on a mission to prevent other families from suffering the same heartbreak of losing a loved one to a shark.

"Losing Merc has put a place in my heart that I can't really put into words. He is - was - my rock, my everything."

Mercury Psillakis was surfing with some friends on September 6 at Dee Why and was only in the water for half an hour before the great white struck.

"If we can make a positive out of this loss, I just want to, like I said, minimise the risk and perhaps prevent this from happening to another family," Maria said.

"I have a little girl that keeps on asking why, and I don't know what t

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