A blue whale is big; it's the BIGGEST animal alive. But it isn't the biggest thing there is. After all, a blue whale would look small sitting on top of a mountain. And though a montain is large, it's no more than a pebble in relation to the whole earth.A blue whale is big; it's the BIGGEST animal alive. But it isn't the biggest thing there is. After all, a blue whale would look small sitting on top of a mountain. And though a montain is large, it's no more than a pebble in relation to the whole earth.