If you want to know the sex of the four-eyed terrapin, you can use the observation method.

The larvae of four-eyed terrapin are more difficult to distinguish between males and females . However, four-eyed terrapins are well-distinguished as adults. The carapace of the male four-eyed terrapin is brown with a few black stripes. The plastron is yellow with black spots. The carapace of the female four-eyed terrapin is grey-brown with a few black stripes.

The carapace length of male and female four-eyed terrapins is also different. Male four-eyed terrapins have a carapace length of 122-135 mm, and female four-eyed terrapins have a long carapace. is 130-134 mm.