Atlantica is the kingdom is located beneath the Atlantic Ocean featured in The Little Mermaid franchise. The kingdom is ruled by the sea king, King Triton and the sea queen, Queen Athena until her death. Atlantica's most famous residents are none other than Triton's free-spirited and adventurous daughter Ariel, her best friend Flounder and the court composer crab Sebastian. These friends usually get Atlantica in hot water but clean up the mess they sometimes start.