Captain Deathbeard is an undead pirate who is involved in the Deathbeard's Demise seasonal event. He can be found south of Father Urhney's home in the Lumbridge Swamp. He asks players to collect phantom doubloons for him so he can repair his ship, locate his missing undead crew and fight whatever attacked them to begin with.
His appearance randomly changes between undead and fleshed.
Captain Deathbeard's appearance and ability to switch between undead and human form is strongly reminiscent of the undead pirate captain LeChuck from the Monkey Island series of adventure games. LeChuck himself was based on historical pirate Edward Thatch, with notable similarities in their braided beards and high cheekbones.