The average body weight of Annan turtle hatchlings is only about 10 grams. The adult Annan turtle shell is usually 13-20cm long and weighs about 10.6 kilograms. Annan turtles are rare in the wild, but they are sold in China and Hong Kong, and There are illegal imports into the United States. A small number of Annan turtles are currently raised in Hainan Island and Kufeng National Park in northern Vietnam. But illegal poaching continues, and wild Annan tortoises are on the verge of extinction. The Annan turtle's head is dark with three or four yellow lines. The breastplate is yellow or orange, and there are black spots on each turtle plate. The limbs are grey-brown, and the fingers and toes are webbed.
Generally, male turtles are larger than female turtles and have longer carapace. The center of the carapace of the female turtle is wider, the plastron is flat, and the tail is short. The cloaca hole is closer to the rear edge of the carapace. The male turtle has a narrower carapace center, the center of the plastron is slightly sunken, the tail is longer, and the cloaca hole is closer to the back edge of the carapace. The edge is further away. The Annan turtle is very similar to the yellow-throated aquatic turtle in appearance. The difference between them is that the top of the Annan turtle's head is dark olive, with light stripes on the front edge that extend behind the eyes, yellow vertical stripes on the sides, and yellow stripes on the neck. It has orange-red or dark yellow vertical stripes, and the carapace is dark brown. Annan's turtles mix with other turtles. In captivity, they are mixed with the Malayan Sea Turtle. In addition, the new jawless turtle is a hybrid of a male turtle and a female Annan turtle. Therefore, Annan turtles should be kept as far away from other related species as possible.
