(A) Mother and calf boto (Inia spp.) sighted off Mocajuba, Tocantins... Brazil’s ‘Mothers of the Mangroves’ protect an ecological and cultural heritage Figure 4. Children and botos interacting in the surroundings of... Mysterious river dolphin helps crack the code of marine mammal communication Recently discovered Brazilian river dolphin’s calls could help us understand evolution of marine mammal communication Rare footage of ‘genius’ dolphins reveals how they ‘talk’ Figure 2. SEM image: Actinocyclus normanii (Gregory) Hustedt: (A)...