The male star terrapin has a tan jaw, brown eyes and a long, thick tail. The female's jaw is yellow, it also has orange eyes and a shorter tail than the male. In addition, the undercarp of males is concave, while that of females is relatively flat. Females will be slightly larger than males. Also, females will have more spots on average than males. The juvenile body is flat, and the carapace gradually rises as it grows to the adult. Adults are about 14 cm in length and belong to small turtles.

The sexual maturity of terrapins is late, generally more than 7 years , Sexually mature turtles will mate from mid-April to the end of May each year. The mating site is in shallow water or on land near the water. There are often several male turtles chasing the head female turtle. Eggs are laid in June-July. The female tortoises will climb to a place far from the water, sunny and soft soil, where they will dig a nest shaped like a thin-necked flask, and lay 2-5 ovals. shaped eggs. The fertilized eggs hatch in 60-70 days with the help of sunlight temperature. If the temperature is too low, the hatchlings will overwinter in the nest until they climb out of the nest in the spring of the following year.