Arlong the Saw is a sawshark fish-man. He was the captain of the all fish-man crew excluding Nami, the Arlong Pirates, a former member of the Sun Pirates, and the older half-brother of Madam Shyarly. He is also a major inspirational figure for the New Fish-Man Pirates.

Following the death of his former captain, Fisher Tiger, Arlong became an Impel Down prisoner, but was granted a pardon thanks to his comrade Jinbe accepting the title of one of the Seven Warlords of the Sea. Once freed, Arlong set his sights on conquering the East Blue, settling himself on Conomi Islands alongside his crew and racketeering the local population. He is also the man responsible for killing Bell-mère, Nami and Nojiko‘s foster mother. Arlong then had Nami become his subordinate, taking advantage of her cartography skills to one day conquer all the Blue Seas.

He had the highest bounty in the East Blue before being defeated by Monkey D. Luffy. Due to his actions and role, he is the primary antagonist of the Arlong Park Arc.