The Pink Amazon River Dolphin

Adult male Amazon river dolphins can weigh 185 kilograms.

The boto is a toothed whale living in South American rivers.

Males measure 16 percent longer than the females.

Repeated skin abrasion turns adult botos pink.

Unfused neck vertebrae let the head turn 90 degrees.

Large paddle-shaped pectoral fins allow improved maneuverability in flooded forests.

A muscular melon on the head powers their biosonar system.

The snout holds 25 to 28 pairs of teeth per side.

Botos eat up to 53 different species of fish.

Slow swimming botos travel at 1.5 to 3.2 kilometres per hour.

Captive Amazon river dolphins are harder to train than others.

Males carry branches and clay balls to impress potential mates.

Baby births happen between May and June during flood season.

One captive boto named Baby lived at least 46 years.