Octopuses can feel pain, just like all animals. Of eating an octopus alive, Dr. Jennifer Mather, an expert on
If an octopus' arm is cut off without the poor guy being euthanized, it's no sweat for the cephalopod. While cut-off limbs do not regrow a new octopus, à la starfish, the octopus can regenerate tentacles with a far superior quality than, say, a lizard's replacement tail, Harmon writes.
There is a consensus in the field of animal sentience that octopuses are conscious beings — that they can feel pain and actively try to avoid it. Kristin Andrews and Frans de Waal posit in a new report published in the journal Science that many animals, including cephalopods such as octopuses, feel pain .
Octopuses likely have nociceptors, as demonstrated from their withdrawal from noxious stimuli (even in severed arms) and suggested by the fact that there is good evidence that even “lower” mollusks possess them.
If you cut off an octopus's arm, the severed limb will still move about for at least an hour. That's because each arm has its own control system—a network of around 400,000 neurons that can guide its movements without any command from the creature's brain.
Like a starfish, an octopus can regrow lost arms. Unlike a starfish, a severed octopus arm does not regrow another octopus. But the biological secrets inside their arm regeneration feat do hold the promise of learning more about how we might better regenerate our own diseased or lost tissue.
Octopuses have blue blood, three hearts and a doughnut-shaped brain. But these aren't even the most unusual things about them!
While mammals and birds possess the prerequisite neural architecture for phenomenal consciousness, it is concluded that fish lack these essential characteristics and hence do not feel pain.
Lobsters, crabs, and octopuses can feel pain and should not be cooked alive, says new report.
Shortly after a squid's fin is crushed, nociceptors become active not only in the region of the wound but across a large part of its body, extending as far as the opposite fin. This suggests that if it feels pain, rather than being able to pinpoint the location of a wound, an injured squid may hurt all over.
Most likely, yes, say animal welfare advocates.
Oysters don't feel pain
Animal sentience is generally measured by the ability to feel pain and experience suffering. The main argument why oysters are vegan-friendly is that they don't feel pain since they have a very simple nervous system and no brain.
Plants do not feel pain because they don't have a brain for any signals to be sent to. Imagine if a human didn't have a brain; they could get cut, but they wouldn't know and there wouldn't be anything to tell that they are in pain...so technically they would not be in pain. Same for plants.
Cephalopod molluscs, and in particular Octopus vulgaris, are well known for their capacity to regenerate their arms and other body parts, including central and peripheral nervous system.
Under aggression, an octopus will change its color to a darker one to scare away lighter-colored animals while it also attempts to increase its body size by standing taller off the ground to scare off smaller animals. Such behavior is meant to intimidate threats and scare off other animals to preserve life.
Luckily, both bites and deaths from these strange creatures are rare, as they usually avoid humans and will only bite if threatened or provoked. There have only been three confirmed deaths from blue-ringed octopus bites—two in Australia and one in Singapore—however, some argue that this number is as high as 11.
“Nope! A sound can emit from the shells of the lobsters — a high-pitched sound — but it's due to steam escaping through a fissure in the shell, not the lobsters 'screaming,'” she explained. This doesn't necessarily mean the cooking process is pain-free for the lobster.
Ripping the legs off live crabs and crowding lobsters into seafood market tanks are just two of the many practices that may warrant reassessment, given two new studies that indicate crustaceans feel pain and stress.
A favored method of preparing fresh crabs is to simply boil them alive. A longstanding related question: Do they feel pain? Yes, researchers now say. Not only do crabs suffer pain, a new study found, but they retain a memory of it (assuming they aren't already dead on your dinner plate).
The naked mole-rat is impervious to certain kinds of pain. It's not alone | NOVA | PBS.
The wild wriggling and squirming fish do when they're hooked and pulled from the water during catch-and-release fishing isn't just an automatic response—it's a conscious reaction to the pain they feel when a hook pierces their lips, jaws, or body.
The slaughter process has two stages: Stunning, when performed correctly, causes an animal to lose consciousness, so the animal can't feel pain. The law states that, with few exceptions, all animals must be stunned before 'sticking' (neck cutting) is carried out.
Snails, spiders and octopi have something in common- they all have blue blood! We're not talking in the sense of royalty, these creatures literally have blue blood. So why is their blood blue and ours red? One of the purposes of blood is to carry oxygen around the body.
Yet octopuses are extremely intelligent, with a larger brain for their body size than all animals except birds and mammals. They are capable of high-order cognitive behaviors, including tool use and problem-solving, even figuring out how to unscrew jar lids to access food.
Spiders, like most arthropods, have an open circulatory system, i.e., they do not have true blood, or veins which transport it. Rather, their bodies are filled with haemolymph, which is pumped through arteries by a heart into spaces called sinuses surrounding their internal organs.