Blue whale
Animal
The blue whale is a marine mammal and a baleen whale. Reaching a maximum confirmed length of 29.9 meters and weighing up to 199 tonnes, it is the largest animal known ever to have existed. The blue whale's long and slender body can be of various... Wikipedia
Mass: 290,000 – 330,000 lbs (Adult)
Eats: Krill
Conservation status: Endangered (Population increasing)
Length: 75 – 79 ft. (Female, Southern hemisphere population, Sexually mature) and 66 – 69 ft. (Male, Northern hemisphere population, Sexually mature)
Scientific name: Balaenoptera musculus
Lifespan: 80 – 90 years (In the wild, Estimated)
Heart size: about 5 feet long