The waters off Cape Cod have seen an uptick in shark visits in recent years . An expert is at sea to investigate and catch - and - release great whites . `` There was a dramatic reduction in the population of great white sharks in the wake of 'Jaws , ' `` LaCasse told CNN . An expert says the increase in shark visits reflects the health of an ecosystem .
The waters off Cape Cod have seen an uptick in shark visits in recent years . An expert is at sea to investigate and catch - and - release great whites . An expert says the increase in shark visits reflects the health of an ecosystem .