Air breathing fish can be divided into obligate air breathers and facultative air breathers. Cetacea are deliberate breathers who must be awake to inhale and exhale. Dolphins are voluntary breathers, who must deliberately surface and open their blowholes to get air. Air breathing fish can be divided into "obligate" air breathers and "facultative" air breathers. The African lungfishes are obligate air breathers, with reduced gills in the adults. Obligate air breathers, such as the African lungfish, "must" breathe air periodically or they suffocate. Rabbits and rodents are also obligate nasal breathers. Ventilation and resuscitation of total and partial neck breathers is performed through the stoma. Horses are also considered obligate nasal breathers. During the newborn period, all humans are obligate nasal breathers. Unlike most animals, porpoises are conscious breathers. Most people prefer to breathe through the nose (historically referred to as "obligate nasal breathers"). Unlike most animals, whales are conscious breathers. They are therefore termed partial neck breathers. The slide breathers were now divorced from air box.