Pink dolphins in the Amazon River have a distinct appearance due to various factors such as genetics, diet, and environment. Their pink coloration is attributed to a diet rich in carotenoids found in their prey. Factors like skin thickness, hormones, and stress may also influence their color. Amazon river dolphins, also known as boto, are the largest freshwater dolphins with unique adaptations for river life. They have robust bodies, distinctive melons for echolocation, and flexible diets mainly consisting of fish and crustaceans. However, they face threats from habitat degradation and pollution, making conservation efforts crucial for their survival as vulnerable species.