The largest animal on Earth is the blue whale, scientifically known as Balaenoptera musculus. These magnificent marine mammals can reach lengths of up to 100 feet (30 meters) and weigh as much as 200 tons. Blue whales are filter feeders, primarily consuming small shrimp-like animals called krill. Despite their massive size, they are gentle giants, known for their spectacular displays while breaching and spouting water from their blowholes. Blue whales are found in oceans around the world and play a significant role in marine ecosystems. However, they remain endangered due to past whaling practices and ongoing threats from climate change and ship strikes.