TAMPA, FL — Lucy, the critically endangered Florida panther that captivated ZooTampa visitors for nearly two decades, has died, zoo officials announced Monday. She was 18 years old.

Lucy, whose full name was Calusa, was humanely euthanized to prevent further suffering after her health declined following a cancer diagnosis in recent years, ZooTampa said in a statement.

Known for her big personality, Lucy enjoyed watermelons, scratches and affection, according to the zoo.

“Lucy leaves a legacy that touched millions of hearts,” said Chris Massaro, senior vice president and chief zoological officer. “While we are saddened by her passing, we are immensely proud to have witnessed her extraordinary life and the joy she brought to people around the world.”

Lucy arrived at ZooTampa in 2007 as a rescued cub suffering from severe dehydration and a head laceration. With the help of the zoo’s animal care and health teams, she recovered and became an ambassador for her species.

According to the zoo, Lucy’s image appeared on a New York skyscraper and a U.S. postage stamp, symbolizing the importance of wildlife conservation.

Florida panthers are the state’s official animal and are currently listed as critically endangered, with an estimated 120 to 230 adults remaining in the wild, according to the zoo. Vehicle collisions are a leading cause of death for these panthers.