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The findings, according to scientists, indicate that shore crabs have some form of pain signalling to the brain from these body parts. They also found that the pain response was shorter and more ...
Shore crabs (Carcinus maenas) also show motivational trade-offs; they will discard a valuable resource (a preferred shelter) to avoid future encounters with painful stimuli, thereby indicating avoidance learning – a key criterion of the ability to experience pain.
In one study, shore crabs, Carcinus maenas received electric shocks in a preferred dark shelter but not if they remained in an unpreferred light area. Analgesia from morphine should have enhanced movement to the preferred dark area because the crabs would not have experienced 'pain' from the electric shock.
It is known by different names around the world. In the British Isles, it is generally referred to as the shore crab, or green shore crab. In North America and South Africa, it bears the name European green crab. C. maenas is a widespread invasive species, listed among the 100 of the World's Worst Invasive Alien Species. [2]
Pain is a complex mental state, with a distinct perceptual quality (nociception), but also associated with suffering, which is an emotional state. The existence of pain in crustaceans is contentious and a matter of scientific debate. DrChrissy 17:17, 14 March 2016 (UTC)
Whether crustaceans as a whole experience pain or not is a scientific debate that has ethical implications for crab dish preparation. Crabs are very often boiled alive as part of the cooking process. This section is an excerpt from Pain in crustaceans § Opinions .
Pachygrapsus crassipes, the striped shore crab or lined shore crab, is a small crab found on both rocky and hard-mud soft seashores of the northeastern and northwestern Pacific Ocean. In North America, this species occurs from central Oregon, south through California to near Ensenada, Baja California , Mexico .
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