I've been working on some dolphin profiles this week - including profiles for Atlantic white-sided and Pacific white-sided dolphins - species you may encounter if you're whale watching in the Atlantic or Pacific Ocean, as well as the common dolphin, which was divided in 1994 into two species, the short-beaked common dolphin and long-beaked common dolphin.
Although these four species have distinct differences, they do have some things in common. They all may gather in huge pods, travel quickly and be entertaining to watch as they bow-ride in front of ships and leap above the water.
Do you have a favorite dolphin species?
Image: Pacific White-Sided Dolphin, Courtesy NOAA