In the United States, Saline Lake Kalsasew is located in southwestern Louisiana. In 2009, the captain of a local shipping company, Eric Rui, discovered and photographed the rarest pink coloring dolphin-bottlkonos lake waters. Apparently, it is the only cetacean in the world, having such a rare color in nature. According to Captain Rui, the unique animal appears on the surface always in company with four other relatives, one of whom apparently is his mother, unwilling to let the scion go.
The unusual dolphin is quite socialized. Its behavior is no different from that of other animals of this species. It is only noticed that it appears less frequently and remains somewhat longer on the surface than other individuals. According to scientists, the dolphin is quite healthy, and its unusual color is not a consequence of adverse ecological situation or harmful solar radiation. The unique animal looks at the world through red eyes, indicating albinism.
Albinism is a rather rare genetic trait characterized by the congenital absence of melanin, a substance that causes eye color, skin and hair cover.
So the unique pink dolphin, experts say, is an albino, although it is completely unclear in which way it inherited so rare genetic quality.
Pink Amazon dolphins
However, in terms of rare cetacean coloration, glamorous albino dolphin is not so single as it might seem. Inias, or river Amazonian dolphins are born paleo-grey with a white abdomen. Their bodies acquire pinkish or bluish coloration with age. How did it happen that dolphins — the original inhabitants of salt waters, settled in rivers?
It is assumed that 15 million years ago the level of the world’s oceans was higher. Huge areas of present South America were under a thick of water. When the ocean retreated, dolphins remained in the former territories.
River dolphins are different from all known oceanic ones. They have a strongly elongated leathery snuff resembling a beak. The main difference is that the cervical vertebrae of the river dolphin are not fused and the head can turn at an angle of 90 degrees relative to the torso. It is very convenient when swimming between flooded trees, which in the Amazon and its tributaries there are many.
A branch of river dolphins earlier than others separated from a common cetacean ancestor and developed independently. Therefore, along with common features, they have some features distinguishing them from ocean representatives of dolphins.
Amazonian pink dolphins are more slow-moving than their sea mates. The usual travel speed is 3-4 km/h and the maximum speed is about 18. Amazonian Inias are playful and curious, easy to tame, but ill to train. Therefore, they can rarely be seen in oceanariums. Locals consider dolphins to be sacred animals. Following the dolphins, fishermen find jambs of fish. Besides, the eenies are cracking down on piranies.
River pink dolphins inhabit the largest rivers of South America — the Amazon, the Orinoco, which flow through the territory of Bolivia, Peru, Brazil, Venezuela, Colombia, Guiana. River Amazon dolphins are listed in the International Red Book as an endangered species.