Right now the mermaid swimsuit trend is all the rage. I found this one on Ebay from China for only $6. But similar styles are available from boutiques on Instagram using the hashtag #mermaid.
Ironically, on yesterday celeb kids, North West and Penelope Disick celebrated their birthday with a mermaid themed party:
Inspired by the Burberry trend, today Diva is featured in a dress from Honey Beez Boutique