Sinead McNamara, 20, was discovered unconscious on the vessel, docked in Argostoli port near Kefalonia, on Friday.
It is believed she passed away while being airlifted to hospital.
The Australian national was a prominent figure on Instagram, with 21,000 followers, and pictures portrayed a lifestyle of travel and adventure.
Her final post on the site was a photograph of an idyllic scene of rocks and grass by the water in Greece.
This image has now become the focus of tributes to the young woman.
One person wrote: “Rest in peace you beautiful human being. I know you’re going to be even prettier in heaven. Condolences to her family.”
Others simply wrote “RIP”.
On a previous post on Facebook, where Sinead had shared vivid pictures of Santorini, a friend had written that she was “living the dream”.
Miss McNamara had been working on the ship owned by billionaire businessman Alberto Baillères for four months.
His family were not on board when she was discovered, according to reports.
Miss McNamara had just finished her final shift on the boat and was about to meet with her sister and mother for a holiday, 9news reported.
Her brother, Jake McNamara, described hearing the news of her death as “the worst news of my life”, The Telegraph reports.
Greek authorities are still investigating the death and an autopsy has been scheduled.
She was reported to have been found unconscious and tangled in rope at the rear of the boat.
The Sunday Times was told that police officers do not suspect foul play.
