How much weight, on average, does a newborn blue whale gain each day during its first year of life?

Blue whales are the largest baleen whale species--in fact they are the largest animal in the world. Blue whales can grow to be about 100 feet (30.5 meters) in length and may weigh around 200 tons. They are mottled bluish gray, with broad flat heads and a small dorsal fin located in the last fourth of the body.

Newborn blue whales are about 23 feet (7 meters) long and roughly 30 tons and can add 200 pounds a day. During this time, the calves feed on milk from their mothers. The milk can contain 50% fat and the calves may drink more than 600 liters per day. That's the equivalent of more than 158 US gallons.

Blue whales are the largest animals to have ever lived on Earth with some individuals reaching lengths of nearly 100 feet (30.5 meters).

A blue whale heart is the size of a Volkswagen Beetle and pumps 10 tons of blood through the massive blue whale body. A blue whale aorta (the main blood vessel) is large enough for a human to crawl through.

Blue whale blows, also called spouts, consist of air and water and rise about 30 feet (9.1 meters) high.