From the perspective of marriage: unmarried women dream of crabs, which means that you and your lover have a bad relationship recently, so that they will eventually separate.
Academically speaking, women who are studying dream of crabs, which shows that your recent poor academic performance is caused by your lack of hard work. I hope your grades will improve next time.
From the aspect of work: women in the workplace dream of crabs, suggesting that villains are in power recently, reminding dreamers to be careful of similar friends around them.
From a health point of view: the sick woman dreams of crabs, which indicates that your recent fortune is very good. The condition that has not improved before seems to have gradually improved recently.