A zookeeper bends down and helps a hippopotamus floss in Yongchuan Safari Park in southwest China's Chongqing Municipality on March 16, 2016. The hippo swam to shore to ask help from the zookeeper, as it felt some discomfort in his mouth after taking a meal. The hippo later seemed to feel much better and returned to cruise around in the water. [Photo/Chinanews.com]