Do spiders feel pain when killed?

Whether spiders feel pain when killed is debated among scientists, as spiders have nervous system that detects damage and responds to harmful stimuli, a process called nociception, but whether they experience pain as subjective emotional suffering like mammals is unclear. Spiders have simple nervous system with ganglia and can sense injury and react to avoid it, such as pulling away when touched, but they lack brain structures associated with emotional pain processing in mammals like cortex. Some researchers argue spiders can experience nociception but not emotional pain, while others suggest they may have some form of pain experience due to behavioral responses like guarding injured limbs. When killed quickly by crushing, death is instantaneous and any pain would be brief. From ethical perspective, many people choose humane relocation rather than killing because even if pain experience is uncertain, minimizing harm is compassionate, especially since most house spiders are harmless and beneficial as they eat pests. If you must kill spider, doing so quickly reduces potential suffering. So do spiders feel pain when killed, they likely feel something akin to nociception, detection of harmful stimuli, but whether they experience emotional suffering like humans is debated, and evidence suggests simple nervous system without complex pain emotion, though they do react to damage.