这种乌龟只有硬币大小！ 

A turtle was seen next to a Mexican coin (墨西哥硬币) on Aug 25. It was the Vallarta mud turtle (瓦拉塔泥龟), one of the smallest turtles in the world. Its shell (壳) is only 7.5 to 9.5 centimeters (厘米) long, said Mexico News Daily.