Foreshadowing: One of the scenes in Marge's home movies was of her watching a net full of Yum-Yum Fish get loaded onto the dock.
Take That!: Lisa and Bart consider Brazil the worst place they've ever been to next to Barnacle Bay.
Bowdlerization: In the Brazilian dub, the disparaging reference to Brazil was re-edited to make it seem like Bart and Lisa were wholeheartedly agreeing that Barnacle Bay was the worst place they've ever been.
Trees into Toothpicks: The episode ends with Barnacle Bay going into the logging business, with the logs being used for porno magazines. Lisa is horrified.