The researchers also showed that there are differences between dolphin species in terms of skull size, some species have curved dorsal fins instead of straight. Perhaps the most popular of the dolphins is the Bottlenose dolphin, which you often find in books or movies. Dolphin I’m dead inside shirt Bottlenose dolphins are smart, easy to train, and they are more accessible to humans in nature than other species.
The River Dolphins live in fresh water and they are found in a variety of rivers around South America and Asia. It is smaller than most dolphin species, with an average size of about 2.5m when fully matured. They come in many different colors such as brown, gray and black.