Orinoco dolphin or 'boto'
A New study reveals a 50% decline of river dolphins in 10 years. Two species of river dolphins live in the Amazon rivers, the boto or Orinoco dolphin (Inia
geoffrensis) and the smaller tucixi or Amazone dolphin (Sotalia fluviatilis). The study was based on a 20 years count in the Mamiraua reserve of the Brazilian rainforest, 500 km West of the city Manaus. Fishery seems the main culprit
according to investigators with dolphins getting caught up in nets and dying. And riversides becoming more densely populated by people dependent on fishing for their food and income.