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What level of pain do fish feel? That, too, is unknown. Zangroniz said studies only use a few species of fish and don't represent the more than 30,000 fish species that exist.
It has been argued that fish cannot feel pain because they do not have a sufficient density of appropriate nerve fibres. A typical human cutaneous nerve contains 83% Group C nerve fibres, [114] however, the same nerves in humans with congenital insensitivity to pain have only 24–28% C-type fibres. [114]
Those who reject that animals have the capacity to experience emotion do so mainly by referring to inconsistencies in studies that have endorsed the belief emotions exist. Having no linguistic means to communicate emotion beyond behavioral response interpretation, the difficulty of providing an account of emotion in animals relies heavily on ...
Rose had published a study a year earlier arguing that fish cannot feel pain because their brains lack a neocortex. [38] However, animal behaviorist Temple Grandin argues that fish could still have consciousness without a neocortex because "different species can use different brain structures and systems to handle the same functions."
Betta fish can exhibit unusual sleep behaviors, often resulting in new betta owners assuming that their betta fish has died. In an aquarium, betta fish sleep anywhere in the tank they feel comfortable, including at the bottom on the substrate, floating at the mid-level, or at the surface.
Celery was probably a typical pet store Betta fish. She was blue with pink tinged-fins, not as iridescent or full-finned as some of her plastic tanked neighbors, but healthy looking enough.
Reviews have been published arguing that fish cannot feel pain because they lack a neocortex in the brain. [ 81 ] [ 82 ] If true, this would also rule out pain perception in most mammals, all birds, reptiles [ 83 ] and cephalopods.
The betta fish and orange cat were close. So much so that his mom went on a whole journey trying to get the cat a new bestie after the fish passed. It really broke Cashie up when Violet died.
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