What is the conservation status of the Blue Whale?

The Blue Whale is listed as Endangered on the IUCN Red List. Facing a very high risk of extinction in the wild.

Where is the Blue Whale found?

The Blue Whale is found in United States, Canada, Mexico, Chile, Argentina, Norway, Iceland, Portugal, South Africa, Australia, New Zealand, Sri Lanka, India, Maldives, Antarctica.

Blue Whale (Balaenoptera musculus) — Conservation Status & How to Help

About the Blue Whale

The blue whale (Balaenoptera musculus) is the largest animal known to have ever existed, reaching lengths of up to 33 meters and weights exceeding 150 tonnes. Found in every ocean on Earth, blue whales undertake some of the longest migrations of any mammal, moving between cold, nutrient-rich polar feeding grounds and warmer low-latitude waters where they calve. As filter feeders, they consume up to 4 tonnes of Antarctic krill (Euphausia superba) per day during peak feeding season, and their iron-rich fecal plumes play a measurable role in fertilizing surface waters and supporting the marine food web.

The blue whale was listed as Endangered on the IUCN Red List, a status that reflects the lasting damage inflicted by commercial whaling before the International Whaling Commission moratorium took effect in 1986. The global population, estimated by the IUCN at between 10,000 and 25,000 individuals, remains a fraction of pre-whaling numbers. Recovery is slow because blue whales reach sexual maturity late and typically produce a single calf every two to three years. Today, ship strikes, entanglement in fishing gear, underwater noise pollution that disrupts their low-frequency communication, and the shifting distribution of krill driven by ocean warming are the principal threats the species continues to face.

Things worth knowing

A blue whale's heart weighs approximately 180 kilograms and beats as slowly as two times per minute during a deep dive.
Blue whales produce the loudest vocalizations of any animal, with calls reaching up to 188 decibels that can travel hundreds of kilometers through deep ocean channels.
The pygmy blue whale (Balaenoptera musculus brevicauda), a recognized subspecies, is found primarily in the Indian Ocean and waters around Indonesia and is slightly shorter than the nominate subspecies.
A blue whale calf gains roughly 90 kilograms per day in its first year, sustained entirely on its mother's milk, which contains close to 40 percent fat.
Populations in the Southern Hemisphere were the most severely depleted by whaling; the South Georgia feeding ground population has shown little measurable recovery according to surveys conducted through the early 21st century.
Blue whales feed almost exclusively on krill, and a single lunge-feeding event can engulf a volume of water exceeding the whale's own body volume.

Blue Whale

Things worth knowing

0 organizations protect the Blue Whale