ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) with open mouth in threat posture, native to Africa

ZSSD / Hippopotamus (Hippopotamus amphibius) swimming submerged in tank, native to Africa

ZSSD / Pygmy Hippopotamus (Hexaprotodon liberiensis) portrait, endangered, native to West Africa

ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) portrait underwater, native to Africa

ZSSD / East African River Hippopotamus (Hippopotamus amphibius kiboko) underwater, native to Africa

ZSSD / Hippopotamus (Hippopotamus amphibius) with mouth open in threat display, native to Africa

Mitsuaki Iwago / Hippopotamus (Hippopotamus amphibius) trio laying in mud beside a river, native to Africa south of the Sahara Desert