Swabbie Steve is a castaway and a pirate monkey who can be found on The Island Which May or May Not Have Monkeys on It. He can be spoken to to receive 1 taijitu. If you speak to him while wearing an M'speak amulet or a Cramulet, he will tell you that he is a pirate, and that The Harbinger sunk his ship, The Barrel.
The message in a bottle to locate this castaway is currently visible. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.