If the crab is between two people, which one of them is the opposite sex and the crab walks to the other person, then it indicates that we must follow our feelings. If it walks towards you, you must go back and proceed with caution. If the crab is between you and another person of the same sex, it tells you about the existence of people trying to delay or prevent what you want.
Crab dream meaning
Read more about dreaming of Crab in other dream meanings interpretations.