![37 - 48 inches, Atlantic Ocean, Atlantic spotted dolphin: Stenella frontalis, Bahama Island, Bahamas, Cetaceans: Cetacea, Laz Ruda, Lazaro Ruda Wildlife Photographer, MARINE LIFE, Mammalia, Marine Dolphins: Delphinidae, Marine Mammals, TheLivingSea.com, [SIZE], blue, juvenile, marine, ocean, underwater, underwater photo, vertical, wide angle](https://oceanwildlifephoto.com/wp-content/uploads/2020/01/190728-152106-0535.jpg)
The evolution of dolphins and other cetaceans originates from a terrestial creature known as the artiodactyls, similar to a small deer. These evolved to an amphibious cetacean. Dolphins and other cetaceans as we known them today appeared on the planet about 50 millions ago. Learn more about cetacean evolution.