Lulu, a 46-year-old western lowland gorilla, died unexpectedly at the Columbus Zoo and Aquarium on Monday, Jan. 24.

Lulu, a 46-year-old western lowland gorilla, died unexpectedly at the Columbus Zoo and Aquarium on Monday, Jan. 24.

The gorilla, Lulu, suffered from arthritis; she had a seizure on Jan. 22, a news release from the zoo said.

"The frequency and severity of the seizures progressed and on Monday, Jan. 24, while being sedated in preparation for an MRI, she stopped breathing and could not be resuscitated," the release said.

An animal autopsy is being performed.

Lulu was born in Africa and at age 2 was brought to the Central Park Zoo in 1966. Lulu came to the Columbus zoo in 1984, where she had three babies. Lulu was also a member of the zoo's gorilla surrogacy program and mothered two infants.

Zoo staff invite the public to share memories of Lulu on the Columbus Zoo Facebook page.