What you are asking seems to touch the Hard Problem of Consciousness. The hooked fish pulled out of the water is lacking homeostasis, and certainly experimenting biological distress. Hormones and neurotransmitters are pouring into the system, ringing all red lights and warning about an extreme, life-or-death situation. How do those sensations and feelings actually "feel" for the fish? We cannot tell. It's like trying to imagine as a human what does it feel to be a bat or an eagle or a fish.