I was in my lfs the other day and saw a tank label with "Serrasalmus Notatus" on it. No piranha in the tank; just some jv pacus. I pointed out the mislabel but was told the piranha were available if I wanted them in the future. But I have yet to find that particular species on this site so I am wondering if they exist or have been renamed, or most likely, the lfs is wrong.