I did some research based on everything you all said and I learned quite a bit. I have no diea why I did not learn any of this during my preliminary research, it might have been that I was not searching for the right things. But at least now I know.
This is what I learned:
I did find out that "ghost shrimp" is a generic name people use to describe all the little shrimps. It is not the pet store's fault they get the most aggressive species (there are several specie families in the ghost shrimp umbrella).
The two most popular are Macrobrachium and Palaemonetes who both have a gazillion sub species. The main overall difference is the Palaemonetes are calmer and friendlier. But they are actually both considered to be in the ghost shrimp category.
I found this picture of a Macrobrachium amazonicum:
and this one of a Palaemonetes ivonicus:
I obviously have the above, what I need is the one bellow.
I will see if some of my fishie friends would like my shrimp and will try to better identify the species I want in the future. If no one wants him I will return him to the store. Not because I need my 37 cents back but because I don't want to release him to the wild, we have enough invasive species in these parts.
This is the website I got the comparison photos, look at fig. 14 and 15. http://www.flmnh.ufl.edu/ucamara/crustaceans.htm
I don't remember the website where I got the species tempermint definitions, I think it might have been mostly and petshrimp.com they have a very nice library of shrimp personalities: http://www.petshrimp.com/shrimpspecies.php
I hope this helps others in the future. :)