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ALTON — Researchers have confirmed at least two bull shark sightings in the Mississippi River over the last 100 years. In both cases, bull sharks managed to swim upstream past St. Louis — more than 1,160 river miles from the Gulf of Mexico where they are normally found — according to paleontologist Dr. Ryan Shell and WVU Potomac State College librarian Nick Gardner. According to the two, bull sharks have been caught in the area at least twice: once in 1937 and again in 1995. They are one of the few shark species known to swim into freshwater and have been known to travel substantially inland in tropical freshwater in Africa, Asia, Australia and South America.

State collegeUnited statesGulf of mexicoMinnehaha creekMississippi riverWest virginiaNick gardnerWright state universityPotomac state college in keyserUs forest servicePotomac state collegeUniversity of daytonFishery sciencesRyan shellRush island power stationApril fool