Nope.These are true freshwater sharks,spending their entire life in fresh.Research is suggesting there may in fact be up to 5 species of Glyphis Shark.The ones you get up the Mississippi are Bull Sharks.We have plenty of them too.They can live for yrs in fresh but are classed as marine as they are more coastal in their normal range.
An extract from
http://www.elasmo-research.org/conservation/river_sharks.htm
