Soft shelled turtles, also known as soft shelled turtles, refer to aquatic turtles belonging to the order Turtles and family Turtles. Soft shelled turtles are distributed in freshwater streams and lakes in Asia, Africa, and North America. The characteristics of soft shelled turtles are a round, soft crust like pancake, webbed legs, a long head and neck, and nostrils located at the front of the fleshy long nose (female turtles are noticeably larger than male turtles). There are two main species of soft shelled turtles in the New World, the prickly soft shelled turtle and the smooth soft shelled turtle, whose dorsal shells are gray or brown. The smooth shell turtle has a shell length of about 35 centimeters, while the soft shell turtle has a shell length of about 45 centimeters, mainly distributed in the United States. There are two species of soft shelled turtles in the Old World: African turtles and Malay turtles.