The Amazon River dolphin averages about 6.5 feet in length. They come in all shades of pink, from a dull gray-pink, to rosy colored pink, to a bright pink like that of the flamingo.The dolphins are actually born gray and slowly turn pink as they age. Male dolphins are strikingly pinker than their femal counterparts; the coloration thought to be a product of scar tissue resulting from rough games or fighting over conquests.Dolphins give birth to live young and do not lay eggs