Marge revisits her summer vacation spot from childhood only to learn that it's gone to pot from overfishing.
- Advice Backfire: At the end of he episode, Lisa tells the people of Barnacle Bay to stop overfishing. They agree...and decide to go into logging. Lisa considers this even worse.
- Bait-and-Switch Comment: When Homer says he knows three people who can make Marge like Barnacle Bay again, it seems he's talking about Bart, Lisa and himself but he's talking about three locals he hires to restore the merry-go-round.
- Bittersweet Ending: The fish are now under conservation, and Barnacle Bay is in business again. But all the trees are cut down to be used for pornography. Lisa considers this a Downer Ending, however.
- Continuity Nod:
- 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.
- I Reject Your Reality: Homer finds himself hallucinating several mermaids while trapped at the bottom of the sea, tangled in seaweed. When finally rescued by the Marine, he berates them for saving him, jumps back into the sea, and retangles himself to continue to hallucinate the mermaids.
- Soapbox Sadie: Once again, the ultra-environmentalist Lisa. She calls Barnacle Bay out on overfishing, leading to a fight with the mayor until he uses Mr. Burns' report of Milhouse against her. It takes until the end of the episode for the island to listen to her, but they decide to cut down their trees instead for porno magazines.
- 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.
- Tempting Fate: The Captain of The Rotten Pelican doesn't mind about the storm and says his knee would warn him if things were really bad. Cue the warning.
- Too Dumb to Live: Homer would rather be at the bottom of the sea to hallucinate than be rescued because he's selfish and hates reality.
- 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.
- Work Off the Debt: Homer is forced to join a fishing crew to pay for the damages caused by his fireworks.