In contrast to many other mammals, cetaceans have relatively small hippocampi that appear to lack adult neurogenesis

Nina Patzke, Muhammad A. Spocter, Karl Æ. Karlsson, Mads Frost Bertelsen, Mark Haagesen, Richard Chawana, Sonja Streicher, Consolate Kaswera, Emmanuel Gilissen, Abdulaziz N. Alagili, Osama B. Mohammed, Roger L. Reep, Nigel C. Bennett, Jerry M. Siegel, Amadi O. Ihunwo, Paul R. Manger