It's probably a juvenile specimen of what is still generally known as Macrobrachium rosenbergii but was recently designated M. dacqueti. One of two closely related species (long referred to by the same heading before morphological analysis showed them to be readily distinguishable, hence the taxonomic confusion) found from Pakistan in the west to northern Australia in the east. The one you have here is widely farmed ("Malaysian blue prawn," "giant river prawn"), and -- just to complicate things further -- there's currently a case before the International Commission on Zoological Nomenclature to restore the name M. rosenbergii in order to reduce confusion for the aquaculture industry. (For more info, in short, search for "M. rosenbergii.")
Gets rather large -- let's leave it at that -- but nonetheless (some would say because of it) an amazing pet.
This particular mix-up (M. dacqueti/rosenbergii as "ghost shrimp") seems to happen a lot in Texas, for some reason -- maybe an aquaculture source there is supplying the feeder market with excess post-larvae.
i have three of these shrimps with a few ghost shrimp, guppies/platy/betta, various snails and a dwarf frog, haven't had any problems and they have gotten quite large for a shrimp. I do feed them various frozen food as well as usual pellets and flake, so maybe that is why I don't have them going after the others in the tank. They really are the coolest looking shrimps and really interesting to watch.