A crab moves a stone because he is playing the game Go. You know this game, right? You put black or white stones on a board until you win the game. This is the Japanese game known as Go. This crab is pretty good.
Go is pronounced Go (ご) in Japanese, too. How convenient is that? Like, super convenient. So easy even a crab could remember!
Currently there are no similar looking kanji which exist in the WaniKani learning system