The Amazon's pink river dolphin population is in freefall

Botos, the river dolphins of Brazil, are in decline due to fishing with Gill Nets. It is expected that this number will fall to at least 95% in 50 years.
A boto (also known as an Amazon river dolphin) in Rio Negro Brazil Sylvain Corier/Nature Picture Library/Alamy

These strange, tiny-eyed, pink-colored freshwater dolphins glide effortlessly through the turbid waters of today's Amazon River basin. They are rapidly approaching extinction.

The Amazon river dolphin (or "boto") (Inia geooffrensis), is one of two species that remain on the planet that are only restricted to freshwater.

Anthony Martin, University of Dundee in Scotland, and his associates have spent over two decades studying botos around the world.