Interesting Facts on the Blue Whale
The blue whale is the biggest animal on earth, weighing about 200 tons (about 33 elephants!) They are also 100 feet long. Their tongues can weigh 1 elephant and their hearts alone, 1 car! Their low frequency whistle can be heard for hundreds of miles and is used to attract/communicate with other blue whales. 
Whale Diet:
The stomach can hold one ton of krill (shrimp-like crustacean) and it needs to eat about 4 tons of krill every day. Its their exclusive food, which they strain huge volumes of ocean water through their baleen plates. Blue whales are found in all oceans except the Arctic Ocean.
Lifespan:
Blue Whales live for about 80 to 90 years. The oldest blue whale was determined to be 110 years old.
Mating Season:
Mating occurs during the fall and winter. Female blue whales give birth every two to three years. Blue whales migrate near the equator to reproduce.
Loudness:
They are also the loudest animal on earth sounding off 188 decibels. A jet engine sounds off 140 decibels. Their language of pulses, groans, and moans can be heard by “others” up to 1000 miles away. The loudest whale call ever recorded however, is the sperm whale which reached levels over 236 decibels. 
Interesting facts
- It has a heart the size of a Volkswagen Beetle(a car).
- A blue whale’s age can be determined by its earwax!
- A blue whale travel at cruising speeds of up to 31 miles per hour!
- They’re endangered
- Once hunted for whale oil
- Were hunted once almost to extinction, until they were protected in 1966
- Sometime whales swim in groups together to gather up food when available in big numbers
- Females give birth to one calf
- Blue whales can be mistaken for a submarine
- Killer whales rarely kill Adult blue whales but may occasionally prey on young calves
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