What is the conservation status of the blue whale?

The blue whale’s conservation status is Endangered. The species is listed as Endangered on the IUCN Red List because its global population remains far below historical levels after centuries of intensive commercial whaling.

Blue whales are the largest animals known to have lived, reaching roughly 30 metres in length. They feed mainly by filtering tiny krill through baleen plates. Before industrial whaling, they were abundant across the world’s oceans; fast steam-powered ships and explosive harpoons later made even these enormous animals vulnerable.

The International Whaling Commission’s 1966 ban on blue-whale hunting helped populations begin recovering in some regions, but recovery has been slow. Ship strikes, entanglement, underwater noise, pollution and changes in krill availability remain threats.

A common mix-up is confusing the species-wide Endangered classification with the status of particular populations or subspecies. Some regional populations have recovered more than others, but that does not remove the blue whale’s overall IUCN listing.