1) The largest known living animal is the blue whale which can grow to be over 100 ft. long and weigh 180 tons.
2) Although whales can grow to be quite large most species have throats that are too small to swallow a human.
3) The smallest known whale is the dwarf sperm whale which can grow to an average size of around 9 ft. long.
4) Baleen whales are born with two blowholes while toothed whale only possess one.
5) Whale poop is extremely important for feeding phytoplankton which remove carbon from the atmosphere.