Two new sharks are popping up in Toronto's harbour — but it's garbage, not people, who should be afraid of heading into the water. PortsToronto has brought in two WasteShark aquadrones to add to its larger trash trapping program. "It's essentially a Roomba that operates on the surface of the water," said Jessica Pellerin, manager of media relations and public affairs for PortsToronto. "[It] cleans up microplastics, debris… things that we don't want on the surface of the water and then we're able to dispose of it properly afterward."