Rosy Life Riders

The Rosy Life Riders (人生バラ色ライダーズ, Jinsei Bara-iro Raidāzu), formerly called the Flying Fish Riders (トビウオライダーズ, Tobiuo Raidāzu) were a kidnapping gang from around Fishman Island. They ride on flying fish, which can stay above water for up to 5 minutes. Their leader is Duval. With the handles on their flying fish and the way they dress, they resemble a biker gang. Since Duval's face alteration, however, the gang was reformed into the "Rosy Life Riders", and their purpose changed.

Sabaody Archipelago Arc
The Flying Fish Riders were first seen helping the Macro Fishman Pirates kidnap Hatchan, a former member of the Arlong Pirates, and holding him in their base. In order to save their friend and assist his partners Keimi and Pappug, the Straw Hats fought against and subsequently defeated them. Sanji completed the matter by rearranging leader Duval's face, allowing him to see the fault of his ways and allowing them to become friendlier with the Straw Hats and give up on the slave trade. After Keimi was captured by other slave traders on the Sabaody Archipelago, Sanji requested their assistance to help find her and get her out of her predicament. To which they do by finding the Straw Hats on the island and flying them to the auction house were Keimi is being held. After that incident they part ways, promising to help the crew while they were still on the island.

Later they're seen watching over the Thousand Sunny so it can be coated, unaware that the Straw Hats had been knocked off the island.