This is a funny fish....as the name implies one would think it is in the sole family it is not. It is a Pleuronectidae, also known as righteye flounders, are a family of flounders. They are called "righteye flounders" because most species lie on the sea bottom on their left sides, with both eyes on their right sides. The Paralichthyidae is the opposite, with their eyes on the left side. A small number of species in Pleuronectidae can also have their eyes on the left side, notably the members of the genus Platichthys.
Hi Chef Adam - Am I going crazy here with the semantics - not really, I am trying to educate everyone between the differences between all the great variety we have and this question comes up all the time. what is the difference between Lemon Sole and Flounder - Actually Nothing? The Commercial industry started called 6-8 pieces of "Flounder" Lemon Sole to segregate for the special buyers. They would call the 4/6 ounce pieces either just Flounder or Large Mix. At the end of the day, it is all just nice Flounder from the best fishing grounds in the world.