Loneliest Mammal in the World?

do you know world loneliest mammal in the world is the 52 Hertz whale,the 52 Hertz whale is too different the another whales and the name give to this whale is most to whale has 15 to 25 hertz frequency but this whale is 52 hertz frequency ,the 52 Hertz sounds are like what we hear from other species of whales such as the Giant Blue whale or even the Fin whale