Dr. Jim Gelsleichter and members of the University of North 's Shark Biology Program were amazed after they caught and released a sawfish, a critically endangered species. He and four UNF students were exploring St Marys River when they found the 10-foot rare shark relative this summer.One of its students discovered the sawfish, a species that evolved from primitive sharks now extinct, after they felt a tug on the line while out in the water.
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