Megalo Shark is a supporting character in the anime and manga series One Piece. He is a massive, friendly white shark who resides on Fish-Man Island and is the loyal pet of Princess Shirahoshi. Megalo often helps the Straw Hat Pirates and the Ryugu Kingdom, notably transporting Luffy and others inside his mouth to sneak them into the palace. Despite his intimidating appearance, Megalo is gentle and easily frightened, providing both comic relief and assistance to the main characters throughout the Fish-Man Island Arc.