Researchers follow the progress of a pair of 2,300-pound great whites . It is estimated that Katharine will be past the mouth of the Mississippi River in a week and will enter the waters off Texas not long afterward if she keeps to her current course . Betsy and Katharine were tagged off Cape Cod ' Cape Cod in this time of year . A researcher says the sharks ' tracks are surprising for August .
Researchers follow the progress of a pair of 2,300-pound great whites . Betsy and Katharine were tagged off Cape Cod ' Cape Cod in this time of year . A researcher says the sharks ' tracks are surprising for August .