가재는 게 편이라
The crayfish sides with the crab.
Used to describe how people with similar traits and backgrounds tend to stick together and side with each other.
The Korean proverb implies that a crayfish and a crab would side with each other because they look similar.
모양이 비슷하고 서로 인연 있는 것끼리 편을 든다는 말
Like attracts like. Birds of a feather flock together.