Fire Tank Pirates

The Firetank Pirates are an infamous and notable rookie pirate crew discovered on the Shabondy Archipelago around the time the Straw Hat Pirates arrived there.

Crewmates
They appear to be based on a mafia family, and many of them are dressed in tuxedos, with coats drapped to their shoulders, and/or wearing cowboy hats.

Crew Strength
All of them appears to be consistently armed with rifles, save for their captain, who has an army of men inside of him, that works his body like a castle, thus giving him a military advantages.

You guys have already lost... in sheer military force.

-Capone Bege.

It can be presumed that they are very strong for them to have made it all the way to the Shabondy Archipelago. And for their captain to have such a high bounty.