Sandfish skinks exhibit only mild sexual dimorphism, so telling the difference between the genders can be a little tricky. But compared to females, males tend to have brighter, higher contrast coloring. They are also generally larger than females, and thicker at the base of the tail.
![Potential male Scincus scincus - Sandfish Sexing Tips](https://i0.wp.com/reptifiles.com/wp-content/uploads/2019/03/male-s.-scincus.png?fit=640%2C316&ssl=1)
Potential male S. scincus
"Scincus scincus" by Alex Slavenko, licensed under CC BY-NC-SA 2.0
![Potential female Scincus scincus - Sandfish Sexing Tips](https://i0.wp.com/reptifiles.com/wp-content/uploads/2019/03/s.-scincus-basem-rabia-needs-CC-license-not-flickr.jpg?fit=640%2C316&ssl=1)
Potential female S. scincus
Photo by basem, licensed under CC BY-NC 4.0