Gavin Naylor of CofC and the Medical University of South Carolina, along with several of his colleagues, is studying a River Shark that lives in the shallow, muddy rivers from Asia to the South Pacific.  Once thought there were three different speices, Naylor has now confirmed that in fact they are all the same family of sharks called Glyphis.  You can read more about his studies here:  http://www.foxnews.com/science/2015/10/14/scientists-go-in-search-elusive-river-shark.html