OMAHA, Neb. (KMTV) — Marina, a 21-year-old, 4,000 pound white rhino passed away at the Henry Doorly Zoo on Monday.
The female rhino came to the zoo in 1999 and lived in the African Grasslands habitat.
Throughout the week, the zoo's Animal Health team worked to treat Marina for symptoms similar to colic. Marina did not respond appropriately to medical treatment.
A decision was made to perform a surgical procedure. The zoo says two equine surgeons, Dr. Mike Black and Dr. Joel Schrader, were brought in to help.
The surgeons discovered Marina had an inoperable colonic obstruction and the decision was made to humanely euthanize Marina, the zoo says.
White rhinos are listed as near threatened by the International Union for Conservation of Nature's Red List.
One male and one female white rhino now live at the zoo.