Blue Whale

The blue whale is the largest animal known to have ever lived on Earth. This marine mammal can reach around 25 to 30 meters in length and may weigh more than 150 tons. Its enormous body is supported by a thick layer of fat that helps it keep its temperature in cold ocean waters.

Like other whales, it breathes air through a blowhole on top of its head and must return regularly to the surface to breathe. Blue whales are found in oceans around the world, usually traveling between feeding areas in colder waters and breeding areas in warmer regions.

Despite its size, the blue whale mainly eats tiny shrimp-like animals called krill. During feeding periods, it can consume several tons of krill in a single day by opening its mouth wide and filtering the water through special plates called baleen.

These whales usually live alone or in small groups and communicate with very low-frequency sounds that can travel over great distances underwater. During the twentieth century, intensive hunting caused a dramatic decline in blue whale populations. Today, the species is protected in many areas, but it still faces threats such as ship collisions, ocean noise, and changes in food availability caused by environmental changes.