Rubber Ducky

Flotsametrics, no doubt, explain the rubber ducky floating in the water just to the right of the Vic Viper at Somnus Reef, Order of Ecclesia. The oceans of the world are all connected, you know.

Rumor also has it, the rubber ducky shows up in a bathtub full of tears (or salt water?) somewhere in Aria of Sorrow. [Update 5/22: Really? I've beaten the game with 98.1% of the castle down the hatch, and I still haven't seen the duck. Maybe they mean Dawn of Sorrow, the sequel?]