Some Screams Can’t be Heard

Anyone who made it through Biology 101 knows that fish have nerves and brains that sense pain, just as all animals do. Dr. Donald Broom, a scientific advisor to the British government, explains, "The scientific literature is quite clear. Anatomically, physiologically and biologically, the pain system in fish is virtually the same as in birds and mammals."

Neurobiologists have long recognized that fish have nervous systems that comprehend and respond to pain. Scientists tell us that fish brains and nervous systems closely resemble our own. For example, fish (like "higher vertebrates") have neurotransmitters such as endorphins that relieve suffering; the only reason for their nervous systems to produce these painkillers is to relieve pain. Researchers have created a detailed map of pain receptors in fish's mouths and all over their bodies. A team at the University of Guelph in Canada recently surveyed the scientific literature on fish pain and intelligence. They concluded that fish feel pain and that "the welfare of fish requires consideration."