Jinbei officially joins Straw hats

Jinbei joins the Straw Hat Pirates crew in episode 876, during the conclusion of the Whole Cake Island arc. However, he first meets Monkey D. Luffy before the rest of the crew, and is invited to join the crew in episode 568 during the Fishman Island Arc. However, he initially refuses the offer because he wants to protect the people of Fishman Island