A 49-year-old gorilla named Pongi has passed away at the Columbus Zoo.
The female western lowland gorilla received an extensive examination Saturday morning because of concerns including lethargy, trembling, elevated respirations and a droopy lip.
Veterinarians said she arrested during recovery and they were unable to resuscitate her.
A necropsy is now being performed.
Pongi has been a member of the Columbus Zoo since 1985. During that time she gave birth three times.
She also became a surrogate mother to three more babies in her later years. She was currently the surrogate mom to eight-month-old Kamoli.
There are now 15 gorillas at the Columbus Zoo and Aquarium.