The pink Amazon River dolphins are considered to be the most intelligent out of the five freshwater species of dolphins in the world. Description from blog.cuipo.org. I searched for this on bing.com/images
:) PINK DOLPHINS OF THE AMAZON. WHY ARE THEY PINK? THE WERE TRAPPED BY THE RISING ANDES MILLION OF YEARS AGO AND SLOWLY BECAME FRESH WATER MAMMALS. THE NO LONGER NEEDED THE OCEN COLOR PROTECTION AND LOST IT.