Fish have endorphines

“Neurobiologists have long recognized that fish have nervous systems that comprehend and respond to pain. 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 alleviate pain. Rese…” via IFTTT from http://amzn.com/k/7jMFGFsuRXu1pyB4iXPSlw

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