Arlong (アーロン, Āron), or Saw-Tooth Arlong (ノコギリのアーロン, Nokogiri no Āron) is a sawshark merman. He was the pirate captain of the all fishman crew, the Arlong Pirates, a former member of the Sun Pirates, and the older brother of Madam Sharley. He is known for being the main villain in the Arlong Arc and had the bounty of 20,000,000 berries, the highest one in East Blue before being defeated by Monkey D. Luffy.
Arlong is a large, muscular, and light blue sawshark fishman whose most distinctive trait is his saw-shaped nose. He has long, black hair sprouting from the back of his neck, reaching down to his shoulders, under what appears to be a brown ushanka, covering his head. He has a fin on his nape, surrounded by his hair, and the gills are located on both the sides of his neck. His Sun Pirates tattoo is on the left side of his chest, while his own Jolly Roger is on his lower left arm.
Arlong's attire is composed of fashionable, light clothes, reflecting his rich status. He wears a sleeveless, unbuttoned yellow shirt decorated by many black lightning-like spots, bermuda shorts which are brown in the manga and green in the anime, a purple sash around the waist and simple sandals. He also sports a lot of jewels: he has a golden chain bracelet around his left wrist and two golden bracelets around each ankle, with straw-like decorations hanging from them. On his hands are what appear to be rings, decorated by colorful gems. However, according to Oda in response to a fan about these rings, these aren't rings at all but more like piercings that go straight through Arlong's fingers, as his hands are webbed and are incapable of wearing rings.
As a member of the Sun Pirates, he wore an A-shirt, sometimes changed to a sleeveless, unbuttoned shirt decorated by flower-like motifs, a bowler hat, and loose pants reaching down below his knees, first a light-coloured pair with a line of similarly light spots on each leg's inner part, and later a similar pair, but darker in colour and with spots on both sides of the legs. He already sported the straw decorations around his ankles and the sandals, and also donned a pair of large circular earrings. During his first raid on the Commi Island, he had a long, light green scarf hanging from his shoulders, and wore a dark green coat and a pair of beige bermuda shorts with a chain-like pattern on them paired with a green sash around his waist. Also, instead of the ushanka he currently wears, he had a simple, dark grey hat on his head.