The Honolulu Zoo’s endangered Sumatran tiger, Berani, was euthanized Monday.

Zoo officials said in a press release today that the decision to put the tiger to sleep was made by veterinarian staff and animal keepers.

Berani, who would have turned 18 on Sept. 4, was born at the Phoenix Zoo in 1999, and was moved to Honolulu in November 2005.

According to the zoo, there are fewer than 500 Sumatran tigers like Berani, and about 200 of them live in zoos as part of a worldwide conservation effort. Officials said the life expectancy of Sumatran tigers at a zoo is 18.4 years, while only about 12 years in the wild.

Last year, the Honolulu Zoo’s Djelita died after holding the Guinness World Record as the oldest living tiger in captivity at over 25 years old.

Chrissie, a female Sumatran Tiger, remains at the zoo.