DeLgAdO said:heres the scienific explination
FISH DO NOT HAVE THE BRAIN DEVELOPMENT THAT IS NECESSARY FOR THE PSYCHOLOGICAL EXPERIENCE OF PAIN OR ANY OTHER TYPE OF AWARENESS
The experience of pain depends on functions of our complex, enlarged cerebral hemispheres. The unpleasant emotional aspect of pain is generated by specific regions of the human cerebral hemispheres, especially the frontal lobes. The functional activity of these frontal lobe regions is closely tied to the emotional aspect of pain in humans and damage of these brain regions in people eliminates the unpleasantness of pain. These regions do not exist in a fish brain. Therefore, a fish doesnt appear to have the neurological capacity to experience the unpleasant psychological aspect of pain. This point is especially important, because some opponents of fishing have argued that fish are capable of feeling pain because some of the lower, subcortical nervous system pathways important for nociception are present in fish. Obviously this argument has no validity because without the special frontal lobe regions that are essential for pain experiences, lower pathways alone cant produce this experience. The rapid, well-coordinated escape responses of a fish to nociceptive stimuli are generated automatically at brainstem and spinal cord levels but, if a fishs brainstem and spinal cord work like a humans (and it is very likely that they do) there is no awareness of neural activity occurring at these levels.
How can u say fish don't feel pain? Pain is the bodies response to something that you're doing that isn't good for your body. And for you to stop whatever you're doing and get the hell out of there. Its a survival response.