Captain Blarney O'Duck is an anthropomorphic duck.
Hired by Scrooge McDuck in 1906 as captain of a sailing ship, Captain O'Duck was tasked with tracking down a supposedly-cursed ghost ship, the Horizon. The Horizon had belonged to the notorious pirate Captain Redbeard until it went out of control, and McDuck sought the treasure he hoped it still withheld.
Unfortunately, Redbeard's jinx on the ship was enough to prevent O'Duck from ever boarding the Horizon. He chased the ghostly vessel for fifty years, always missing it by an inch, until 1956, when, just as McDuck was growing tired of financing O'Duck fruitless ventures, he managed to find the ship and treasure with the help of Donald Duck and his nephews.
Unfortunately, O'Duck's ship was destroyed in the process, but he quickly found a lasting job as the new captain of the Old Ironsides, an 18th-century ship touring the coasts as a tourist attraction.