Mermaid could refer to:

• Our Mermaids Are Different, a trope about the many and diverse depictions of merfolk.
• Mermaids, the 1990 Dramedy directed by Richard Benjamin and starring Cher, Bob Hoskins, Winona Ryder, and Christina Ricci.

You might also be looking for this trope:

• Mermaid Problem, which addresses the problem of Interspecies Romance between a man and a mermaid.

Or you may be looking for these works:

• Mermaid Melody Pichi Pichi Pitch
• Mermaid Saga
• Mermaids: The Body Found
• The Little Mermaid