It's a green sunfish...

Google 'em... If it was as big as you said it's a BIG one...Most are quite small...

Thier mouth is quite a bit bigger than a bluegill or pumpkinseed, but they tend to be quite a small fish..

What lake did you catch it in..?? I haven't caught any inNY's Finger Lakes, but they are very common in the Tioga County PA reservoirs, the Hammond and Cowanesque dams...