| a freshwater South American dolphin, Inia geoffrensis, having a long snout and fluctuating in color between pink and gray: inhabits the Amazon and Orinoco river systems. |
| Amazon dolphin n. A South American dolphin, Inia geoffrensis, that inhabits the Amazon and Orinoco rivers and fluctuates in color from bright pink to gray, depending on age and environmental factors such as sunlight, water temperature, and stress. Also called boto. |
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