Well you can call it what you want, TNjugger - some people call rock bass "redeye," after all, even though the true redeye is a completely different fish.
But that's a sharpnose. Maybe some people call them sand sharks as a regional name, but the actual sand shark (aka sand tiger) is an entirely different fish.
Sand shark (Carcharias taurus):
http://en.wikipedia.org/wiki/Sand_shark
Note the large rear dorsal fin, which the shark in your picture does not have.
Atlantic sharpnose (Rhizoprionodon terraenovae):
http://en.wikipedia.org/wiki/Atlantic_sharpnose_shark
Oh, note the gray spots.
As a general rule, I usually know my fish.
bd