Surfer Mercury 'Merc' Psillakis killed in great white attack at Dee Why

A long‑time local surfer died after a great white shark attacked at Dee Why Beach on Sydney’s northern beaches just after 10 a.m. on Saturday, friends and witnesses said.

Surfers on the water said Mercury "Merc" Psillakis saw the shark and was trying to warn and group his fellow surfers before the animal breached from behind and struck. Toby Martin, a former professional surfer and close friend who rushed to the beach with Psillakis’s wife Maria, described the attack as sudden and catastrophic.

"He was at the back of the pack still trying to get everyone together when the shark just lined him up," Martin told the Daily Telegraph. "It came straight from behind and breached and dropped straight on him. It's the worst‑case scenario. They normally come from the side, but this one came straight from behind, breached and dropped on him. It was so quick."

Surfers on the break said the shark, estimated at about five metres, severed Psillakis’s surfboard and inflicted fatal injuries. Fellow surfers pulled him to shore; friends said they dragged him about 100 metres to the beach. His wife, Maria, and others who arrived at the scene were confronted with the aftermath of the attack.

Emergency services were called to the scene and police have been involved in initial inquiries. Local surf clubs and residents said shock and grief spread quickly through the northern beaches community as word of the attack spread.

Psillakis was a well‑known figure around Dee Why and other nearby breaks, described by friends as generous and deeply connected to the local surf community. In May, he organised a paddle‑out at Dee Why in memory of Shane Herring, a former world tour competitor and revered local surfer who died earlier this year. Those who attended the paddle‑out recalled Psillakis’s role in bringing surfers together to honour Herring beyond the breakers.

The attack has prompted renewed discussion in the area about beach safety and shark‑spotting measures. Authorities have historically balanced public safety with the ecology of marine life, including great white sharks that frequent parts of Sydney’s coastline, and local officials routinely review safety protocols after such incidents.

Neighbours and friends began leaving tributes on the sand and at nearby surf clubs on Saturday afternoon, reflecting on Psillakis’s long association with the waves he frequented since childhood. Local clubs and some surfers planned to hold informal gatherings in the coming days to remember him.

Police and other agencies continue to investigate the circumstances of the attack. No official casualty figure beyond Psillakis has been reported, and authorities have not issued additional public safety directives at the time of publication. The northern beaches community is preparing for further statements from local officials and surf organisations as more information becomes available.