Kristina
The name hippopotamus means ‘river horse’ and is often shortened to hippo. At birth, the baby, called a calf, is a whopping 23 to 50 kg. When it dives, the calf closes its nose and ears to block out water. All hippos have this ability.When it dives, the calf closes its nose and ears to block out water. All hippos have this ability. At 5 to 7 years old, the hippo calf is fully mature.
