Fish pain is different from pain that mammals experience … what about other genus?

“Fish brains are structurally different from our own. They look like beans and lack the developed neocortex that causes mammals (ourselves included) to feel pain. Nociceptors, sensory neurons that react to bodily damage, are rare or completely absent in fish, especially top-level predators like shark…” via IFTTT from http://amzn.com/k/2aCzwjh3T8OX6J25AToJ8g

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