Endangered blue whales from the Eastern Tropical Pacific breed and feed in an offshore, highly productive oceanic feature called the Costa Rica Dome. Compiling data on the blue whales’ use of the area and the overall productivity was the first step, followed by submitting a case study for protection of the area to the Convention on Biological Diversity (CBD), publicising the value of the area, gaining local support, and working with MarViva and other NGOs on regional agreements..