The actual eyes still need to be made, but here's the basic shape for it :3

The main of the expression was referenced from Lancifer's reference sheet: http://www.furaffinity.net/view/13821948/

 kuroba

The open mouth on the sides should sorta show the side teeth like in the profile view on the reference, which isn't something you see very often in fursuits, but it'll still be possible to open the mouth for air/water :3

This head's also got a lot of room around the eyes on the inside to account for glasses.