Mother hippos give birth underwater so it's perhaps no surprise that baby hippopotamuses like to spend most of their day submerged. This little hippo, pictured at just one week old, was born at Zoo Antwerp in Belgium on May 22nd. The calf might look like a little tyke but baby hippos can weigh over 100 lbs (45kg) at birth!

(Note the Shrek-ears and water spouting)