Answer:
The best-known dolphin, the bottlenose dolphin is gray with a whitish belly.
However, there are dolphins in several colors and patterns.
The common dolphin is a combination of dark gray with white.
The Commerson’s dolphin is black and white like the killer whale which is the largest dolphin and also it is black and white.
There is even a pink dolphin, which is the one who lives in the Amazon river.