There are two types of bottlenose dolphins in South America that look different and live in different places. Now genetics suggests they are becoming separate species
Source:
https://www.newscientist.com/article/2228742-bottlenose-dolphins-are-splitting-into-two-different-species/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home