The Amazon River dolphin, which is also known as the boto or pink river dolphin, is estimated to number in the tens of thousands, according to the World Wildlife Fund. However, the pink river dolphin is still classified as a vulnerable species in some areas.

Pink river dolphin populations are rapidly declining in areas where rivers and lakes are contaminated. Fragmenting dams are another hazard to these cetaceans. However, humans are the greatest threat to pink river dolphins. Pink river dolphins drown after becoming tangled in fishing nets. Humans sometimes hunt pink river dolphins, as they are sometimes perceived to be in competition for fish, according to the Rainforest Alliance.