There is a unique feature about the blue whales that are found off the coast of Sri Lanka: unlike other large whales, they do not migrate.

But that means the endangered cetaceans spend their lives in a busy corridor for shipping traffic, which is a major cause of whale deaths.

While shipping companies and environmental groups are in agreement that the solution is to move a traffic separation scheme in Sri Lankan waters, stakeholders involved in the effort said the island nation's government has yet to take steps at the International Maritime Organization to make the move.