The heroine Ariel is a strong and independent little mermaid. She is full of curiosity about the world beyond the ocean! When she met the handsome prince on land, her heart was full of excitement. With the help of friends such as Red Crab and Flounder, Ai Lier bravely rushed out of the underwater world, overcame the spell, and finally found the feelings he wanted.

In the plot, Disney changed the original tragic ending into a happy ending, and added many vivid characters. The little mermaid Ariel was portrayed as Disney's first heroine with modern personality. The staff even joked that if Walter Disney were still alive, a runaway girl like Ariel would never be allowed.

As the last hand-drawn cartoon of Disney, this film used thousands of different colors as 1 100 background pictures and drew more than one million pictures. Among them, 10 special effects artists were used in the scene of only two minutes of storm, which took more than a year to complete. Mermaids are often called dugongs. Dugong's body is spindle-shaped, about 3 meters long and weighs 300-500 kilograms. There are sparse short fine body hairs all over the body. There is no obvious neck, the head is small, the upper lip is horseshoe-shaped, the snout has bristles, and the front end of the head is juxtaposed with two approximately circular breathing holes; There is no external auricle, and the ear hole is located behind the eye. There is no dorsal fin, and the flippers are oval. The caudal fin is wide, the left and right sides are flat and symmetrical, and the rear edge is forked and engraved. There are a pair of breasts under the flippers. The back is mainly dark gray, and the abdomen is slightly shallow.