♫The seaweed is always greener, in somebody else's lake♪

A little bit of underwater enchantment for you...

A pain to remove, but so easy to do - if you're looking for your own mermaid inspired manicure, lay down a deeply pigmented polish - I used Sally Hansen's "Teal-y Fast", a gorgeous shimmery teal shade that shines through all the glitter.  
All you do after that is dot and sponge different hued chunky glitters (Sinful Colors makes some perfect for this) until you're pleased with the effect.   Don't forget to smooth it out with a good, thick coat of seche vite!