An 'Easypass' Tollbooth System for Giant Bluefin Tuna (image) Hopkins Marine Station at Stanford University; Acadia University; TAG a Giant Share Print E-Mail Caption Canada's Ocean Tracking Network (OTN), which includes listening lines across the Cabot Strait and the Scotian Shelf off Nova Scotia, forms part of an array of underwater receivers on North America's east coast. Additional receivers along the North American coastline let scientists log visitation of the bluefin from Canada to the Bahamas, and as far east as Gibraltar at the entrance to the Mediterranean Sea. Credit Barbara Block et al Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.