Bligh severely mistreats the crew of the Bounty and sure enough, just as Willie predicted, they revolt against him.
After Bligh and Willie are cast off in a boat, Willie revolts against him, taking the boat and leaving Bligh on a turtle.
When he tries ordering the turtle he's on to swim faster, he dives down with an annoyed expression.
Forgotten Framing Device: While the Simpsons are waiting for their meals at the Frying Dutchman, a seafood restaurant, Marge, Bart, and Homer each tell a story with a nautical theme. The episode ends at the end of Homer's story and we don't see the Simpsons at the conclusion of the story.
Ghost Pirates: At the end of the episode, the crew from the second segment appear and turn out to have become a skeleton crew.
Insult Backfire: When told that he eats dolphin boogers, Capt. Bligh shrugs and admits that it might happen when one eats dolphins as often as he does.
I Warned You: Bligh is told by Willie after the crew mutinies that he warned Bligh it would happen. Bligh shrugs it off.
Jerkass: Bligh is a big one, as he is a Bad Boss and thus performs a Kick the Dog at every opportunity, and even after the crew mutinies, he's still a jerk to Willie, and even to the turtle he's left sitting on when Willie revolts against him.
Kick the Dog: Bligh does this to his crew by throwing away their mail from home, informing them the mail had cookies in it, rather bluntly informing Milhouse his father had died while baking said cookies, and whacking members of his crew with his cutlass when their singing of a sea shanty displeases him.
Laser-Guided Karma: For being a colossal jerk and a Bad Boss to the Bounty's crew, Captain Bligh is left adrift in a boat when the crew mutiny against him, and is left on a turtle when Willie mutinies against him. He presumably drowns when the turtle goes underwater when he dares it to.
Off with His Head!: Offscreen example. When the Bounty's crew wanted a suggestion box, Bligh gave them one. It was made of the head of the one who suggested it, Martin Prince.
Oh, Crap!: Bligh, when he hears guns click behind him and realizes the crew are mutinying.
Tempting Fate: Capt. Bligh thinks his crew will never revolt. When he and Willie are left in a life boat, he dares Willie to revolt and it results in Capt. Blight being left on a turtle, which he dares to dive (it promptly does so).