If I was hooked in the mouth, or anywhere for that matter I sure would not be doing alot of flopping around. I have hooked seals before they definetly feel pain, they came right in and could not wait for me to remove the hooks. Fish definetly dont feel pain, if they did they would not fight so hard against the pull of the line. Even if fish did feel pain I would still put the hurt on! PETA has some different Info but I dont care I am a cold blooded, molesting, fishermen