Animated daughter of King Triton

ARIEL

This red-haired mermaid traded her voice for legs in a famous Disney tale.

The clue refers to Ariel, the well-known animated character from Disney's "The Little Mermaid," who is the daughter of King Triton. The name "Ariel" directly answers the clue without any wordplay, as it's a straightforward reference to the character. This is a simple definition-style clue where the answer is the name of the mermaid princess. If you're familiar with Disney films, this one should be easy to spot.