A video of a Pink dolphin is doing the rounds on social media.

A Twitter user shared a video that shows a rare pink dolphin swimming across the ocean.

According to the website of National Geographic channel, these pink dolphins are found in the Amazon River of South America.

The website states that it is due to the albinism that occurs when cells that normally make the pigment melanin, responsible for skin, hair, and eye colour, fail to produce it at normal levels, or at all.

This is usually because of a mutation in one of several genes.