The largest known whale is the blue whale.
In fact the blue whale is the largest known living animal in existence.
This mammal can reach lengths in excess of 100 ft. when fully grown and weigh more than 150 tons!
To get a better idea of this whales massive size the blue whale measures more than an official NBA basketball court which measures in at 94 ft. long or if you compared it to the size of a football field which measures 360 ft. long the blue whale would measure in at roughly 1/4 the size of an official football field.
Even the children are big measuring in at around 20 – 25 ft at birth.
Despite its massive size and streamlined body this whale generally travels no more than 5 mph.
Baby blue whales are able to consume as much as 100 gallons of milk per day and gain as much as 200 pounds per day during its first year!
In regards to this species (actually in regards to most baleen whales) the female whale typically grows to be larger than their male counterparts.
In order to maintain its size an adult blue whale may consume as many as 40 million krill per day.
The krill itself is relatively small in size measuring in at around 1 – 2 centimeters on average although some krill can reach lengths of around 6 inches.
In addition to its massive size this whale is also one of the loudest living animals.
One of the most popular sounds made by this whale is known as a whale song which is produced during mating season and is believed to be a primary tactic used to attract a mating partner.
During mating season these songs can be heard many miles away and whales may be heard singing in synchronicity to these songs changing their pitch and notes in harmony.
The blue whale gets its name from that fact that it appears to be completely blue when submerged underwater despite its grayish blue skin tone when it is at the surface.
Blue whales are largely solitary animals and often prefer to travel either alone or in small pods.
The largest formations of blue whales tends to occur either during periods of feeding or during mating season.