Looking through these Mermaid Costume pictures will let you see some examples and give you some good ideas so you can decide what costume is best for you to wear on Halloween.
Here's a mermaid Barbie costume.
Here's a blue sequin mermaid costume.
Here's a cute crochet mermaid costume for little girls.
Here's a two piece Ariel from The Little Mermaid costume.
Here's a gold Sea Worthy mermaid costume.
Here's a form fitting teal mermaid costume.
Here's a Cosplay Ariel costume with painted on seashell bikini top.
Here's an adorable newborn mermaid costume.
Here's a DIY Little Mermaid Ariel costume with long red wig.
Here's a cute kids' mermaid costume with long tail.
Here's an adult mermaid costume with extra long tail fin.
Here's a girl's mermaid costume with extra long tail.