A Sperm whale is an extinct marine mammal that lived in oceans during the Holocene and may have been the top predator of the world's oceans. They were carnivorous and fed on wide varieties of marine animals, even including "dolphins". They were probably among the smartest animals of planet Earth as brain case scanning suggests. They probably swam like a fish much like dolphins and even "orcas".
Community content is available under CC-BY-SA unless otherwise noted.