Ghost Shrimp is the LFS name for them, but sometimes the LFS sells non-native species.
The two native species of freshwater shrimp inhabiting the unimpounded upper
Mississippi River (UMR) are the Ohio Shrimp (Macrobrachium ohione) and the Glass Shrimp
(Palaemonetes kadiakensis).
The Ohio Shrimp, M. ohione, ranges from Alabama to Texas and is on the northern periphery of its range in Illinois and Ohio . It also occurs along the eastern coast from Florida to Virginia. This species of shrimp is endemic to the United States and is the only Macrobrachium sp. found in the Mississippi River drainage. Ohio Shrimp can reach a total length of 100 mm, but average 60 mm.
The Glass Shrimp, P. kadiakensis, is the only species in this genus that occurs in the unimpounded UMR. This shrimp ranges from northeastern Mexico, north to the Great Lakes and east to Florida. In large rivers, this shrimp associates with low velocity backwaters. The Glass Shrimp reaches a total length of 36 mm. This species is common in the central and southeastern United States. However, because of its limited commercial value, it has not been well studied.
taken from:
http://www.umesc.usg.../amn_shrimp.pdfHere is an image I got from a shrimp forum to help ID species.