I just love fish tail nail art! I kind of prefer to call it braided nail art though because I don't like saying "fish tail"... it sounds gross. I think everybody knows it as that though, so I'm conforming!
I've never actually got round to trying this style before now, so this is my first one. I took a peek at the tutorial on Lucy's Stash first to make sure I got it right! I used Barry M Guava Gelly as my base colour, and for the braiding I used Barry M Plum Gelly and Silver Foil Effects.
I deliberated for a while on whether to use nail art brushes or the bottle brushes, in the end I went with the bottle brushes because Barry M ones are quite thin anyway. If your nails are small though you might be better off using a nail art brush.
I was surprised at how easy it was, can't wait to try another one with different colours!