Mako Merman Tail?

[SeaMansa]

u

[Aquos Savar]

Go to the Mertailor. There, you simply choose the silicone tails and change the fluke for "H20 Replica" and change the tail color, which also changes the fluke color and, WHAM!!

Instant Zac Merman Tail for a nice retail price of 2,800 US Dollars

[Mermaid Wesley]

Except zacs fluke is shaped differently than the girls' flukes ;)