Mermaid Make-Up

I'm still debating what I should go as to Nancy-Raven's Party. As I was looking at some Ask Me Makeup videos, I found this one that shows how to achieve a Mermaid look (I saw turquoise, I had to click):

Mermaids are mythical creatures, so it would fit with the theme! Although, considering I don't exactly have what one might call a Bikini Body, so I'm not sure what my costume would look like. Maybe a Mermaid Style Dress? Get it?! What, too obvious? OK, I'll leave stand-up jokes for the experts.

Then again, I could use this tutorial in different gray hues for my Selkie costume... Now there's an idea!

Ah! So many costumes, so little time... (And money, and occasions to wear them all.)