Tears, fears and a medical evacuation: Here's everything you need to know about brand new series Shark!

Six celebrities are about to dive straight in for new series Shark!

The high-octane show will have hearts pounding, showing us high-profile Australians as you've never seen them before, facing fears and testing their limits among the crystal-clear waters of the Bahamas – home to up to 40 species of shark.

Shark! premieres Sunday, May 31 on Channel 9 and 9Now.

Where can I watch Shark?

Shark premieres on Sunday, May 31, at 7pm on Channel 9 and 9Now and continues Monday at 7.30pm.

What is Shark about?

Shark takes a group of high-profile Australians out of their comfort zones, putting them through a series of shark-related challenges designed to test their courage, resilience and push them to their mental and physical limits.

The stakes rise with each escalating task, taking them from the safety of a cage to a daunting, open-water swim with one of the ocean's most formidable, feared and misunderstood apex predators, the tiger shark.

But if the teaser trailer is anything to go by, it is not all going to go to plan:

"We're going to have to abort the dive," a voice yells before Aussie TV legend Lynne McGranger receives medical attention.

Footage then shows a rescue helicopter taking off as it is explained "we've had to medically evacuate her."

Who are the cast of Shark?

These six Aussie celebs are heading to the Bahamas, but this is no tropical holiday:

Ariarne Titmus

Four-time Olympic gold medallist Ariarne Titmus is a titan in the pool, used to performing under the highest of pressures.

Recently retired from professional swimming, Ariarne still holds several world records and was also awarded the Medal of the Order of Australia.

Despite a career built in the water, Ariarne has a lifelong phobia of sharks – can she finally overcome it?

Tammy Hembrow

Tammy Hembrow is one of the world's biggest influencers with a social media following of more than 16 million.

The Gold Coast local is very comfortable in the water and is confident in her abilities to take on the challenges.

Despite living in the public eye, Tammy believes Shark viewers will see a raw and personal side to her they have never seen before.

Scott Cam

TV audiences are very used to seeing Block host Scotty Cam on their screens, but not in a Hawaiian shirt!

The Gold Logie winner comes from a long line of fishermen and a beach-loving Sydney family, so he's been taught about the dangers of sharks from a young age.

This means Scott enters this experience with genuine hesitation, but it is a once-in-a-lifetime opportunity he knows will make his children and grandchildren proud.

Lynne McGranger

Lynne McGranger was a fixture of Australian television for more than 30 years, but after departing Home and Away last year, she's back for a very different challenge.

Unlike many of her fellow celebs, Lynne's not that afraid of sharks – her biggest worry is learning how to use all the diving gear and gadgets!

Lynne, 73, enters Shark with a mission to inspire and prove to older women that they can do anything.

Sam Thaiday

NRL legend Sam Thaiday's NRL career began in 2003 with the Broncos, whom he led to a premiership victory in 2006. He represented Queensland in 29 State of Origin matches and wore the green and gold for Australia.

He enters this experience with zero fear and is most looking forward to discovering a spiritual connection to his Torres Strait Islander heritage, as the hammerhead shark is his family's totem.

Known as the "shark whisperer", Sam also hopes to teach his children not to fear the unknown and help his castmates face their fears.

Matt Nable

Actor and author Matt Nable has appeared in series and films such as Apple Cider Vinegar, Last King of the Cross, Underbelly and Netflix's recent shark thriller, Thrash.

While he has played tough guys across film and television, in real life Matt's fear of sharks has only increased with age, especially after an attack in his northern beaches community.

Beyond the physical challenge, Matt's journey is deeply personal. After losing his brother to motor neurone disease, he is taking on this opportunity in his honour to raise awareness for MND research.

Who are Paul de Gelder and Annie Guttridge?

The celebrities will be led on their Shark journey by Australian shark attack survivor and former navy clearance diver Paul de Gelder and shark researcher and photographer Annie Guttridge.

Paul's life changed forever in 2009 when he was attacked by a three-metre bull shark during a routine navy training exercise in Sydney Harbour.

The harrowing encounter cost him his right hand and leg but after recovering, Paul became one of the world's leading shark advocates, defending the predators who nearly took his life.

He is also an accomplished host, author, actor and motivational speaker.

Annie is a dedicated shark conservationist, marine advocate and award-winning photographer.

She has travelled the globe documenting the underwater world and is a highly skilled expert in both freediving and scuba diving.

Annie and her husband also run non-profit Saving the Blue, which conducts scientific research to restore and recover threatened marine species.

Where is Shark filmed?

Shark is filmed in Bimini in the Bahamas.

While the district is renowned for its crystal-clear blue waters, vibrant reefs and tropical climate, Bimini is also the shark diving capital of the world – making it the perfect place to face the fear of what's lurking beneath!

Shark! premieres Sunday, May 31 on Channel 9 and 9Now.

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