There are several Trout Management Areas in CT, but the only FFO no kill section that I'm aware of is on the Housatonic. The Farmington has a no kill section, but the restriction is single barbless hooks, so it's not FFO. The Salmon has a FFO section, but it's not a no kill stretch.
There have been several smaller rivers that have been newly designated as TMAs starting this season, so there may be others that I'm not currently aware of. In fact, I'm pretty sure that the Housatonic has another added to it at Bull's Bridge and Gaylordsville.
What do anglers think? They're glad to have some rivers that are open to year round fishing, although it can be quite crowded at times.