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Cincinnati Zoo's Beloved Hippo Fiona Shares Sixth Birthday Cake With Baby Brother Fritz

Happy Birthday Fiona!

San Antonio Zoo's Timothy Eyes Fiona, Calls Himself a 'Hippo Looking for Love'

Hungry? Hippo Pays a Late-Night Visit to South African Gas Station

Baby Hippo Fritz Playfully Chases Big Sister Fiona in Cincinnati Zoo

Baby Hippo Introduced to Big Sister Fiona at Cincinnati Zoo

Thirsty Thirsty Hippo: Cincinnati Zoo Hippopotamus Catches Raindrops in Mouth

Baby Hippo Fiona Treks Outside During Warm January Day

Philadelphia Zoo Hippo Demolishes Snowman Snack

Texas Zoo Captures Hippo's Adorable 'Snooze Bubbles'

Off to See the Hipponnotamusses at the Zoo

San Antonio Zoo Hippo Crushes Watermelon 'Like Nobody's Business'

Baby Hippo Fritz and Big Sister Fiona Play Fight With Mom Close by

'Grumpy' Hippo's Wild Act After Being Provoked by Lions

Cincinnati Zoo Hippos Dazzle Visitors With Pumpkin-Crushing Skills

San Antonio Zoo Hippo Crushes Watermelon 'Like Nobody's Business'

Fiona the Hippo Gets Up Close and Personal With Waterfall at Cincinnati Zoo

Tourist Amazed as Hippo Stops Traffic in South Africa

Lions Play With Halloween Decorations at Werribee Zoo

Halloween Treat: Hungry Hippos Snack on Pumpkin

Hippos Take Part in Painting with Carers at Texas Zoo

Cincinnati Zoo Debuts Fiona's New Tricks on World Hippo Day

Cincinnati Zoo Shares Some Never-Before-Seen Moments of Baby Hippo Fiona

Herd of Hippos Check Out South African Rugby Field

Hippo-Hippo Hooray! Cincinnati Zoo's Fiona Celebrates Fourth Birthday With Yummy Cake