Which McDonald's mascot was associated with Filet-O-Fish advertising as a pirate?

Captain Crook was the pirate mascot associated with McDonald's Filet-O-Fish advertising.

Captain Crook belonged to McDonaldland's large cast of product-linked characters. His pirate identity connected him with the restaurant's fish sandwich, giving Filet-O-Fish promotions a distinctive personality separate from the hamburger-focused Hamburglar. The character appeared in the same broad advertising universe as Ronald McDonald and Mayor McCheese.

Captain Crook is easy to confuse with the Hamburglar because both were presented as mischievous figures in McDonaldland. Their roles were different: the Hamburglar targeted hamburgers, while Captain Crook was linked to the Filet-O-Fish. Officer Big Mac was another separate character with a law-enforcement theme.

This kind of mascot segmentation was a notable feature of McDonald's twentieth-century branding. Characters helped the company give individual menu products memorable identities while preserving a shared fictional world. Captain Crook became less prominent as McDonald's moved away from its large national cast of characters.