While they are among the most well-known whales, they are endangered and their population is only a fraction of the pre-whaling era.

They are protected from commercial whaling by international law, but they are still threatened by ship strikes, entanglements, and the impact of climate change.

As krill populations are affected by warming ocean temperatures, so too is the Blue Whales’ primary food source, which may impact their health and breeding success.

Blue Whales can consume up to 4 tons of krill per day during feeding season.

Blue whale poo plays a crucial role in the marine ecosystem, as it is rich in iron and other nutrients, which are scarce in many parts of the ocean. Blue whales defecate and release nutrients into the water, promoting phytoplankton growth. Phytoplankton, in turn, supports the entire marine food web and contributes significantly to the ocean's carbon cycle by absorbing carbon dioxide during photosynthesis. This process is often called the "whale pump," highlighting the importance of whales in maintaining healthy and productive ocean ecosystems.