Bata-bahari

Bata-bahari

Uainishaji wa kisayansi

Himaya:	Animalia (Wanyama)
Faila:	Chordata (Wanyama wenye ugwe wa neva mgongoni)
Ngeli:	Aves (Ndege)
Oda:	Anseriformes (Ndege kama bata)
Familia:	Anatidae (Ndege walio na mnasaba na bata)
Nusufamilia:	Merginae Rafinesque, 1815

Ngazi za chini

Jenasi 11:

Bucephala Boie, 1822
Camptorhynchus† Bonaparte, 1838
Chendytes†
Clangula Leach, 1819
Histrionicus Lesson, 1828
Lophodytes Reichenbach, 1853
Melanitta Boie, 1822
Mergellus Selby, 1840
Mergus Boie, 1822
Polysticta Eyton, 1836
Somateria Leach, 1819

Mabata-bahari ni ndege wa maji wa nusufamilia ya Merginae katika familia ya Anatidae. Mabata hawa wanaishi baharini hasa nje ya majira ya kuzaa. Wengi wana tezi za chumvi maalum ambazo zinawawezesha kuvumilia maji ya bahari. Mabata-domomeno hupenda zaidi mazingira ya mito.

Mabata-bahari hula samakigamba na gegereka wa chini ya bahari. Mabata-domomeno hula samaki. Meno ya madomo yao yanawasaidia kushika mawindo. Takriban spishi zote zinatokea kanda za kaskazini mbali.

Spishi za Afrika

Melanitta nigra Bata-bahari Mweusi (Common Scoter)
Mergus serrator Bata-domomeno Kidari-chekundu (Red-breasted Merganser)

Spishi za mabara mengine

Bucephala albeola (Bufflehead)
Bucephala clangula (Common Goldeneye)
Bucephala islandica (Barrow's Goldeneye)
Camptorhynchus labradorius (Labrador Duck) imekwisha sasa
Chendytes lawi (Law's Diving-goose) imekwisha sasa
Clangula hyemalis (Long-tailed Duck or Oldsquaw)
Histrionicus histrionicus (Harlequin Duck)
Lophodytes cucullatus (Hooded Merganser)
Melanitta americana (Black Scoter or American Scoter) (pengine inafikiriwa kama nususpishi ya M. nigra)
Melanitta deglandi (White-winged Scoter) (pengine inafikiriwa kama spishi ndogo ya M. fusca)
Melanitta fusca (Velvet Scoter)
Melanitta perspicillata (Surf Scoter)
Mergellus albellus (Smew)
Mergus australis (Auckland Merganser) imekwisha sasa
Mergus merganser (Common Merganser or Goosander)
Mergus octosetaceus (Brazilian Merganser)
Mergus squamatus (Chinese Merganser)
Polysticta stelleri (Steller's Eider)
Somateria fischeri (Spectacled Eider)
Somateria mollissima (Common Eider)
Somateria spectabilis (King Eider)