True percula

[Maxi]

I am going to get my first pair of true perculas soon. My question is, how do I know its a true percula? I want to get the right thing at the LFS.

Thanks

-Max

[LulusMoogle]

True Percula:
http://www.liveaquaria.com/images/categories/product/p-39092-True-Percula.jpg

False Percula:
http://www.saltwaterfish.com/site_11_03/images/229_falsepercmarka1620.jpg