A baby hippo swims in its enclosure at Prague Zoo, Czech Republic, February 24, 2016. It was born on January 28, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims under the water near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims under the water in its enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims in its enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo stands near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims under the water in its enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo gets into the water near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo stands near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims in the water near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A baby hippo swims under the water in its enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A hippo named Slavek is sprayed with water in its enclosure at the zoo in Prague, Czech Republic, Wednesday, February 24, 2016. (Photo by Petr David Josek/AP Photo)





Newborn baby hippo swims with its mother Maruska at their enclosure in the zoo in Prague, Czech Republic, Wednesday, February 24, 2016. The baby was born on Jan. 28, and is yet to be named. (Photo by Petr David Josek/AP Photo)





A newborn baby hippo swims with its mother Maruska in their enclosure at the zoo in Prague, Czech Republic, February 24, 2016. (Photo by Petr David Josek/AP Photo)





A newborn baby hippo sits in its enclosure at the zoo in Prague, Czech Republic, Wednesday, February 24, 2016. (Photo by Petr David Josek/AP Photo)