Sannakji is a Korean raw baby octopus. You are probably wondering what is wrong with eating octopus. Well, this one moves even when it is dead. Yes, you read it correctly, it moves even when it has been chopped into tiny pieces.
When you cut off its limbs and cover it in oil, its suctions caps still have enough gripping power and can attach onto your throat, and choke you. The best advice would be to move away from this dish. It tastes good, smell good, but kills you in an instance.