The South American river basins were flooded by marine waters, creating a new brackish habitat that allowed marine mammals … See more

Their necks are flexible, since their cervical vertebra are movable; this is remarkable since nearly all cetaceans' neck vertebra are fused, which rigidly aims most other cetaceans' heads forward. The Iniidae have other morp… See more

There is scientific debate on the number of species within the genus Inia: The main issue is whether there are two or three species, or whether those can be considered sub-species. According to some researchers … See more

The family was described by John Edward Gray in 1846.
Current classifications include a single living genus, Inia, with one to four species and several subspecies. The family also includes thr… See more