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

Thirsty Thirsty Hippo: Cincinnati Zoo Hippopotamus Catches Raindrops in Mouth

Cincinnati Zoo's Baby Hippo Begins Bonding With Her Mother

Cincinnati Zoo's Fiona, Bibi 'Kiss Crash' Under Water in Adorable Display of Affection

Dallas Zoo Welcomes Birth of 'Much-Anticipated' Newborn Hippo

Friendly Hippos Save Struggling Duckling in Rotterdam Zoo

Off to See the Hipponnotamusses at the Zoo

Animals at Chicago Zoo Treated to Spooky Snacks

Hungy Hippo Munches on Melon As If It's a Grape

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

Fiona the Hippo Now Too Large to Greet Zoo Staff Through Enclosure Window

Tucker The Hippo Celebrates 21st Birthday

Baby Hippo Fiona Proves Even a Toot Can Look Cute

Cincinnati Zoo's Baby Hippo Dives Deep

Eager Hippo Awaits Visitors at Cincinnati Zoo

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

Philadelphia Zoo Throws Pumpkin Pool Party for Resident Hippos

Baby Hippo Enjoys Rainy Day at Cincinnati Zoo

Watermelon No Match for Hungry, Hungry Hippo at San Antonio Zoo

Cincinnati Zoo's Hippo Fiona Enjoys Halloween Pumpkin

Halloween Treat: Hungry Hippos Snack on Pumpkin

Fiona the Hippo Gets up Close And Personal With Her Mom in Cincinnati

Cincinnati Zoo Posts Compilation of Adorable Baby Hippo Fritz Videos

Fiona the Hippo Play Fights With Her Mom at Cincinnati Zoo

Hippo Enjoys 'Spa Day' at San Antonio Zoo