Sinful Colors Open Seas, from the Adventure Island display, is supposed to be an exact dupe for OPI Mermaid's Tears. I don't have that to do a comparison, but I'll tell you what - Open Seas is awesome. Like all of the other polishes I've swatched from AI, it has a jelly creme formula. Completely opaque at two coats!
I'm repeating myself here a lot, but I'll say this phrase again, this is a murky, dusky shade of mint green - it has just the slightest hint of yellow to it.
Yummeh. I love it!