For Chinese, crab is always related to eating. It is one of gourmand's favourite, either steamed or fried. Even when drinking, people will play "hand games of crab"; for fun. In Western society, crab (cancer) is one of the twelve star signs. Someone born between 23rd June and 23rd July is called a Cancer. In addition, crab has an alternative medical interpretation- cancer.
Around 400 BC, Hippocrates, the "father of medicine", described cancer as a crab which damages human body. Therefore, he named cancer the Greek word "Karkinos". Meanwhile, the Latin word "cancer" also means crab.