Marius doesn't realize that the boat party doubles as a birthday party until he arrives on the boat itself.

"Well, at least I brought something," he says, glancing down at the bottle of rum he'd purchased from his own work for the occasion. One of the most sought after brands in their stock, he spent a pretty penny on it as a gift for Hook, for the stock on his own ship.

He smiles at the various foods displayed around the ship, though he really doesn't know anyone else there. Still. He's here for Hook, and so he sets off looking for the pirate.