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A bit of a read, but: http://www.flyanglersonline.com/alc...l/ac051203.html
Summary: " Of the 150 plus papers I read on the Internet, every paper dealt with nociceptive pain in mammals except one, and that was Dr. Sneddon's paper. Several dozen papers described how nociceptive impulses travel to and are registered as pain in the neocortex of the brain (a part of the brain fish don't have). They also explained how reactions and other responses to that type of stimulus are controlled by various parts of the brain, but focused on the neocortex as the area where pain is registered. OK, so far it's at least 150 to one against Dr. Sneddons research.
Dr Bruno Broughton, Ph.D., one of England's leading fisheries biologists, agrees with Dr. Rose. Concerning Dr. Sneddon's research he says, "In particular, although they found special sensory cells around the mouth of the fish and drew parallels with the presence of sensory cells in higher mammals, they did not examine the capability of the fish's brain to process the information. Fish just don't have the brains to recognize pain. The so-called emotional center of the brain is missing in fish."
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