The Great Australia Day Swim will again be held in Brighton on January 26.
The carnival raises tens of thousands of dollars for Brighton Rotary projects.
Young gun Dean Wilson will try to retain his 5km title, which the Bonbeach 16-year-old superfish has held for the past two years.
The ambassador for the swim spectacular is record-breaking marathon man John van Wisse, who has conquered long-distance challenges across the world.
Great Australia Day Swim director Stuart McIntyre said while swimmers would have a lot of fun, it was also a great event to watch.
“Over 1000 swimmers will participate in open water events around the pier, breakwater and marina, which will provide a spectacular vantage point for spectators,” he said.
“There will be live entertainment and food stalls on the concourse in front of Middle Brighton Baths.
“It is a great way to celebrate Australia Day.”
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