As Gabrielle Nevitt explains, dimethyl sulfide is created when krill consume phytoplankton. And some birds in the order Procellariiformes — albatross, petrel, fulmar — are especially good at detecting dimethyl sulfide, perhaps up to 20 kilometres away.

They are called “fishes of the air” because they widely roam the oceans and only come to land to breed.

— Read more at Oceanic birds can smell what the ocean is cooking kilometres away, says U.S. research scientist at Vancouver Sun.