Groundwater under the sea floor off the coast of Prince Edward Island could solve a host of problems for the Island, but there are a lot of questions that need to be answered first. The research vessel Maria S. Merian is currently off the North Shore of P.E.I., using various techniques to search for groundwater below the bottom of the Gulf of St. Lawrence. "P.E.I. is 100 per cent reliant on groundwater and it's a finite resource, and we are very cautious with how we use it, as we should be," said Josh MacFadyen, the Canada Research Chair in Geospatial Humanities at the University of Prince Edward Island.