Omsin, a 25-year-old turtle who underwent surgery to remove 915 coins from her stomach, has sadly died.
The reptile had survived the successful operation two weeks ago and appeared to be recovering.
However, Dr Achariya Sailasuta, a professor at the veterinary faculty at Bangkok’s Chulalongkorn University, has revealed that the swallowed coins had poisoned her.
Bank lived in a public pond in Chonburi province, about 110 miles south east of Bangkok, Thailand, where tourists had tossed in loose change.
In the country many believe this brings good luck, but, sadly, Bank mistook the coins for food.
The turtle ate so many that they eventually formed an 11lb (5kg) weight in her stomach, cracking her shell.
Vet Nantarika Chansue told local media: “At 10:10am she went with peace. She is my friend, teacher and patient”.
The green sea turtle typically has a lifespan of around 80 years, and is listed as an endangered species by the International Union for Conservation of Nature.
It inhabits tropical and subtropical coastal waters around the world. Named for the colour of its skin, rather than its shell (which is brown or olive), it is one of the largest turtles at sea.
On average, it weights 700 pounds (317.5 kilograms).