Mermaids

Mermaids are a humanoid species featured on ABC's Once Upon a Time. They are native to Enchanted Forest and Neverland, and first appear in the first episode of the third season.

Trivia

 * The crowns worn by the mermaids in "The Heart of the Truest Believer" were made by Vancouver-based accessories designer Medicina Designs.

Appearances
Note: "Archive" denotes archive footage.
 * Mermaids are mentioned on Pan's map of Neverland in "Lost Girl".
 * A mermaid is mentioned on the poster in the Wizard's workroom in "It's Not Easy Being Green" and "Kansas".