I’ve been in awe of Blogenbeaute’s tutorial for beach nails for a long time, even if her sunbathing people and speedboat are photoshopped! But the depth she creates with the water is something else. https://m.youtube.com/watch?v=7Hz3CBSqpMU
It used quite a lot of polishes…
Zoya Bar 
Seventeen Peacock 
2True Arete
Essie Kisses & Bisses
Handmade Midnight Jelly
Chanel Coco Blue
NCLA AM: Beauty Sleep, PM: Shopping Spree
Graffiti Nails Ice White
Orly Sparkling Garbage
Ciaté Cookies & Cream and Frost Yourself beads

Hopefully I did the tutorial justice! I think using a texture polish — Zoya Bar is from the 2014 Pixie Dust collection — added something different.