A thing I've often wondered is whether or not certain animals are immune to pain.

I've often read about Naked Mole Rats being unable to feel pain. Also I thought about other animals like Jellyfish who actually don't really have a brain and thus shouldn't have a reaction to pain.

So are there any animals or let's just say lifeforms that aren't immobile that are actually completely unable to feel pain?

  • Anything without nerves or sensory cells cannot "feel pain". For instance, sponges have neither.
    – Is Begot
    Jun 18, 2014 at 14:59
  • According to the FAQ, Skeptics.SE is for researching the evidence behind the claims you hear or read. This question appears to be your own speculation, and is off-topic. Please edit it to reference a claim that other people are making and flag for moderator attention to re-open (or get 5 re-open votes).
    – Oddthinking
    Jun 18, 2014 at 15:29
  • @Oddthinking I apologize. I thought I'd just bring some personal thoughts to the topic with the jellyfish. I did however read about the mole rat in wikipedia and other places.
    – Jutschge
    Jun 18, 2014 at 15:36
  • I followed up to see if there was a simpler question: "Do naked mole rats feel no pain?" but Wikipedia and other sources make it clear that there are only certain types of pain-triggers that other mammals detect that Naked mole rats don't. Wikipedia provides a good reference to support the claim, so there is little to add.
    – Oddthinking
    Jun 19, 2014 at 0:50


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