Nociceptors are receptors in our skin and throughout our bodies that respond to noxious stimuli. For example, when bodily tissue is damaged or subjected to heat or pressure, nociceptors respond and send messages along nerve fibers to our brains, thereby generating the feeling of pain. Teleost fish (fish that are bony such as trout) have nociceptors too, and their nociceptors look just like ours when viewed under a microscope. This does not prove that they feel pain, of cours