This picture taken on November 8, 2016 shows Andatu, a Sumatran rhino, one of the rarest large mammals on earth, at the Rhino Sanctuary at Way Kambas National Park in eastern Sumatra.

Malaysia's only remaining Sumatran rhino passed away this week, making the species entirely extinct in the Southeast Asian country. The rhino was living in the state of Sabah on the island of Borneo, which is part of Malaysia. The total global population of wild Sumatran rhinos is now less than 80, all of whom are found on the island of Sumatra.

The Sumatran rhino, which is the smallest rhino species in the world (both in size and in population), was declared extinct in the wild in Malaysia back in 2015. At that time, only two Sumatran rhinos remained in the country, both of whom were being held captive on a wildlife reserve. The country's final male rhino, Tam, passed away in May 2019 at a little more than 30 years old, The Telegraph reported at the time. Now, six months later, the final female rhino, Iman, has passed away at the age of about 25.

According to The Guardian, Iman had struggled with health issues for the past few years, primarily cancerous uterine tumors, and cancer is what ultimately ended her life this week. She also experienced sudden massive blood loss on several occasions, but managed to push through and stay alive. Interestingly, scientists harvested Iman's egg cells in hopes of artificially inseminating her to repopulate Sumatran rhinos in Malaysia, but it was never fruitful, as per The Guardian.

How very sad. Malaysia's last known Sumatran rhino, Iman, died this morning; she'd had cancer https://t.co/NYOpxmgBaM All hopes for the species now rest on Indonesia's Sumatran rhinos on the islands of Sumatra & Kalimantan — Save the Rhino (@savetherhino) November 23, 2019

“Iman’s death came rather sooner than we had expected, but we knew that she was starting to suffer significant pain,” Augustine Tuuga, the director of the Sabah wildlife department, said in a statement, according to The New York Times. “Despite us knowing that this would happen sooner rather than later, we are so very saddened by this news,” said Christina Liew, Sabah's environment minister, according to the Associated Press.

According to the World Wildlife Fund (WWF), Sumatran rhinos were previously only found in Borneo and Sumatra; now that Iman has died, the species is only found in Sumatra, a western Indonesian island.

We’re heartbroken by the news that Sumatran rhinos in Malaysia are now extinct.



We can’t let other species follow the same fate as Iman. We must do all we can to show our outrage about what is happening to our planet. #AdoptABetterFuture. pic.twitter.com/EfcPvbgNyl — WWF UK 🌍 register to vote! (@wwf_uk) November 25, 2019