Ben, the Philadelphia Zoo's Asian black bear, has died. He was 23.

The zoo said he was euthanized Wednesday after a losing fight against squamous cell carcinoma, a malignant form of skin cancer.

Ben, who was born Natural Bridge Zoological Park in Virginia in August 1994, had been at the zoo since April 2002.

“During his many years here he was one of the most beloved and most popular animals among zoo staff and guests alike,” the zoo said in a post on Facebook.