Cetacea toothed whales and two in baleen whales. The nostrils are located on top of the head above the eyes so that the rest of the body can remain submerged while surfacing for air. The back of the skull is significantly shortened and deformed. By shifting the nostrils to the top of the head, the nasal passages extend perpendicularly through the skull. The teeth or baleen in the upper jaw sit exclusively on the maxilla. The braincase is concentrated through the nasal passage to the front and is correspondingly higher, with individual cranial bones that overlap. In toothed whales, connective tissue
Small-toothed palm civet palm civets, this species is solitary, arboreal and nocturnal. Its gestation period is 45 days, and the average litter size is 3, which are born in dens made in the trees. Young open their eyes at 11 days and are weaned at two months. It can have two litters a year and there is no set mating season. It can live for 11 years. It is threatened primarily by deforestation, as are many Southeast Asian forest animals. Small-toothed palm civet The small-toothed palm civet ("Arctogalidia trivirgata"), also known as the three-striped palm civet, is a palm civet. It lives in