GULF BREEZE, Fla. -

A Florida Panhandle zoo is celebrating the birth of a baby hippopotamus.

The 65-pound calf was first spotted last week by the train conductor at the Gulf Breeze Zoo.

Zoo officials say they haven't gotten close enough to the calf to determine whether it is male or female. The calf's parents -- Cleopatra and Kiboko -- have lived at the zoo since 2005.

Zoo director Kayte Wanko tells the Northwest Florida Daily News that it wasn't easy to determine when the 4,000-pound Cleopatra was expecting. Wanko says it's hard to tell that hippos are pregnant because "they're already very large."

The zoo is asking the public to help name the new hippo.