The blue whale is a marine mammal and a baleen whale. In fact, it is the largest animal known to have ever existed and still exists. That's why a lot of people every year want to see huge blue whales and swim with these animals too. Despite its size, this kind of animal is not dangerous to humans at all, as it's not aggressive and it has no teeth, and also it looks so adorable in this fanart Blue Whale Sticker.