Watch: Hippo Keepers At Cincinnati Zoo Set Up Hidden Camera To Capture Fiona's Antics

Fiona the hippo and her mother, Bibi, live at Hippo Cove at the Cincinnati Zoo, and the hippo keepers were noticing something odd.

They noticed whenever they left the building, the hippos would bellow loudly. So, they decided to set up a hidden camera and captured those sounds!

Check out the video!