It is not difficult to distinguish males and females of three-sided black turtles, so let's talk about it with everyone.

From the tail: male three-sided black turtles have thicker tails, Conversely, female three-sided black turtles have shorter tails.

From the point of view of head markings: the head markings of male three-sided black turtles are brighter, on the contrary, the head markings of female three-sided black turtles are darker.

Judging from the V-shaped notch at the end of the plastron: the angle of the male black turtle is smaller, and the angle of the female is larger.