Great white shark Lydia, who was being tracked as she became the first of her species to cross to the European side of the Atlantic ridge, has swum around and is heading to more familiar waters it seems.
She had been heading due east across the Atlantic and came within 700 miles of the Westcountry coastline - the nearest recorded for a shark of her species.
However, her GPS tracker that has been following her ever since it was fitted by a research team in Florida, now shows she has made a sharp turn and put on speed to head north westerly - away from the UK.
The 2,000lbs shark had been meandering around the depths ever since crossing the Mid-Atlantic ridge and at one stage was on course straight towards the Westcountry coastline.
Scientists revealed they also thought Lydia might be pregnant.
Lydia was being tracked thanks to a special device attached to her dorsal fin.
Every 'ping' from her tracker shows her movements across the ocean.
Bookies Ladbrokes had offered odds that Lydia was 2-1 to visit Cornwall as her first port of call.
Although great whites are known to travel huge distances and others are believed to have crossed the Atlantic before now, Lydia is the first to be actually recorded as having made the fantastic journey.
US scientists from OCEARCH, who attached the tracking device a year ago, have been following Lydia's progress for 19,500 miles as part of a groundbreaking ocean life study.
Chris Fischer, expedition leader and founding chairman of the OCEARCH shark tagging project, said Lydia may be looking for somewhere to rear young.
He said: "If I had to guess, I would guess that Lydia is pregnant and that she has been out in the open ocean gestating her babies and that this spring she will lead us to where those baby white sharks are born - the nursery."
Great white sharks normally give birth to around two to 12 babies at a time after a gestation period of 11 months.
Blood samples didn't show Lydia was pregnant when researchers used a 34,000kg hydraulic platform to hoist her from the water to fit the tracking device.
But Mr Fischer, who has led numerous ocean expeditions, said there is uncertainty over how exactly the species reproduce.
Lydia had been heading north but made a sharp turn back towards east, putting it on a collision course with the UK coastline.
Her GPS tag only gives off a signal when she's near the water's surface meaning scientists sometimes have to wait days between new readings.
Mr Fischer said it was impossible to predict where she'll head next.
He said: "If you forced me to guess where that was, I'd say it was over in the Mediterranean, near Turkey - but that's longball I'm playing.
"She could turn around right now and head back to Florida."
The Ocearch project aims to tag sharks to learn more about their movements.
The team used a 34,000kg hydraulic platform to hoist Lydia from the water in order to fit the tracking device.
Though Lydia's journey is impressive, great whites are known for their marathon migrations.
In 2003 a great white nicknamed Nicole travelled from South Africa to Australia and back - a whopping 12,400 miles.