Adventures of the Little Mermaid (1991) is a Sci-Fi & Fantasy, Animation, Action & Adventure, Kids series that follows marina, a lonely mermaid, is bored of underwater life. She wants legs. She goes to the sea witch. She is given a magic whistle that when blown, can turn her into a human or mermaid. The Prince and Marina fall in love but she can't stay with him until she can get the sea witch off her case.ja Adventures of the Little Mermaid is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 6.5 out of 10 from 4 votes. Fans of sci-fi & fantasy series may also want to explore similar titles below.