According to this BBC article: "crustaceans have decentralised nervous systems, meaning that unlike fish, they can't be rendered unconscious with a single blow

According to this BBC article: "crustaceans have decentralised nervous systems, meaning that unlike fish, they can't be rendered unconscious with a single blow to the head. To "spike" a lobster to death, again unlike fish, you have to pierce the body in more than one spot." From: What's the kindest way to kill a lobster? (Yes, I'm aware of the irony of the headline) http://www.bbc.com/news/world-europe-42647341 http://www.bbc.com/news/world-europe-42647341