The humpback whale is a mammal which belongs to the baleen whale suborder. "E. japonica" is a very large, thickset baleen whale. The dwarf form has the most complex coloration of any baleen whale. Eobalaenoptera is an extinct genus of baleen whale belonging to Balaenopteroidea. Gigi was the first captive baleen whale. The minke whale , or lesser rorqual, is a species complex of baleen whale. Cephalotropis is a genus of baleen whale belonging to the extinct family Cetotheriidae. Mixocetus is a genus of extinct baleen whale belonging to the family Tranatocetidae. Parietobalaena is an extinct genus of baleen whale, belonging to the family Pelocetidae. The humpback whale ("Megaptera novaeangliae") is a species of baleen whale. Mammalodon is an extinct genus of archaic baleen whale belonging to the family Mammalodontidae. Mauicetus is a genus of extinct baleen whale from the Late Oligocene of New Zealand. They have been known to attack baleen whale calves, and even adult whales. Baleen whale remains include ancient minke whales, grey whales, bowhead whales, and cetotheriids. Nannocetus is an extinct baleen whale belonging to the family Cetotheriidae.