The Amazon river dolphins have drastically dwindled in numbers because of erosion and pollution in the river basins.

But a new law passed by Bolivian President Evo Morales aims to protect the endangered species.

The new law bans fishing for the freshwater dolphins and encourages programs to protect them and their habitats, which have been damaged by erosion, pollution and woodcutting in the river basins.

The president announced the law Tuesday along the shores of the Ibare river in Bolivia's Amazon region.

The dolphins are often pink and have longer snouts than their saltwater cousins. They can weigh 65 to 90 pounds (30 to 40 kilograms).

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