Water level seems low. Hopefully its only for a temporarily period of time. Do you see any movements? She might be or she could just be a fatty.
But is the lighter one the male? How many rays are in there? Seem like there is no mature male around, as I see no present mature clasper on them OR it could just be the pictures.....
The water , i took the the pictures, when i cleaned the water. all female, the two big is about 16 inch. the male i forget to pic it. here is the male, its about 16 inch too.