Random Thought for the night.
Prince Eric and Ariel's Marriage probably destroyed the economic stability of Prince Erics kingdom. Think about it , the movie clearly shows that the kingdom is a coastal town. Now it would stand to reason that a large part of this kingdoms income comes from fishing as is shown in the opening scene of the movie. Now unless Ariel is a total heartless bitch i don't see this sitting well with her. Afterall these arent just random faceless fish to her , they are her friends her comrads. She has grown up with these sea creatures and i can't imagine her just sitting on her throne while her friends and family are slaughtered wholesale. Now of course they could switch to trade possibly but this is assuming they have natural resources to trade and the proper setup to become a trading port as many coastal towns they rely on fishing don't. Even if they slowly shift towards import and export this still means atleast 5 or 6 years of economic upheaval before things are settled. Most fishing ports aren't equipped to handle cargo boats as they are usually double the size of an average fishing boat. Not to mention you can't just go from fishing to shipping it takes time and training. Now of course they could seek the help of a shipping company from another country but then the kingdom risks slowly becoming nothing more than a common wealth of a larger nation not to mention going from lowly fishing boat a ship holding cargo opens the entire fleet up to piracy.
Just doesnt seem fair does it.