What product did McDonald's use Captain Crook to promote in McDonaldland?

McDonald's used Captain Crook to promote the Filet-O-Fish in McDonaldland advertising.

Captain Crook was a pirate-themed character whose role connected him with McDonald's fish sandwich. The character used familiar pirate imagery to make the product memorable within the broader cast of McDonaldland figures.

His name is sometimes confused with the Hamburglar's role. The Hamburglar targeted hamburgers, while Captain Crook was associated with the Filet-O-Fish. Grimace also had a separate early association with milkshakes.

These character-product links were part of McDonald's broader branding strategy. Instead of presenting products only through ordinary menu photography, the company gave them distinctive fictional personalities that could be reused in commercials and promotional material.