A different story arc in the little mermaid. Ursula doesnt know that flounder is friends with a princess, or else she probably would have asked for the trident.
At midnight, Flounder changes back and Ursula comes to collect. She gets blasted pretty quick by the king and everyone lives happily ever after! Except for King Trident who isnt sure hes comfortable with his little girl marrying a fish. He will come around.