Dolphins TOOB (Safari Ltd.)
4.8 (8 votes)
Oceanic dolphins are among the most fascinating and exciting group of marine mammals. Delphinidae are the most species-rich family of extant cetaceans, with roughly 35 recognized extant species. This lineage arose roughly 10-17 million years ago during the Miocene, branching off from its common ancestor with porpoises and monodontids. This family is very diverse, ranging from the Hector’s dolphin (Cephalorhynchus hectori) that maxes out at 1.6 meters and 60 kilograms, to the killer whale (Orcinus orca) that can surpass 9 meters and 9 metric tons.
