Crab has a very good moral, it means eight ways to get rich, if you want to give it to a friend, it is to wish the other party can be rich. Moreover, crab also stands for thanks, because its pronunciation is very similar to thank you, which is also a way to express thanks.
Crab is an interesting creature. Its walking route is different from that of most animals. Many people will think that crab is a symbol of tyranny. But in fact, it is more to warn people that there is not only one road to success. Sometimes, if you change your mind, you may be one step closer to success. For the crab tattoo, it has a lot of good moral, and it is also the symbol of cancer in the 12 constellations.
Source: @heatherpilapil