It's just kilometres from where a woman was killed by a shark last month.
An alert has been posted on Auckland Council's Safeswim website.
Globally, the number of shark bites is on the rise.
Shark Lockdown airs on Sunday night on Discovery.
The Kiwi survivalists are back for a special episode of Naked and Afraid on Discovery.
The shark weighs more than 1600kg.
Footage shows her yelling at TV cameras as she's taken to a rescue helicopter.
Riley Elliott's research was too important to not jump in.