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Description
How do Amazon river dolphins change color? Well, when they're born, Amazon river dolphins are grey. But as they grow older, their skin turns pink. The Amazon river dolphin is dull when relaxed, but lightens to a pinkish color when excited and moving quickly as blood flows faster near the surface of the river dolphin's skin. River dolphins are slow movers, they normally cruise through the river at one mile per hour, but can swim at six miles per hour for short distances when necessary.

Description
How do Amazon river dolphins change color? Well, when they're born, Amazon river dolphins are grey. But as they grow older, their skin turns pink. The Amazon river dolphin is dull when relaxed, but lightens to a pinkish color when excited and moving quickly as blood flows faster near the surface of the river dolphin's skin. River dolphins are slow movers, they normally cruise through the river at one mile per hour, but can swim at six miles per hour for short distances when necessary.