| Also known as: | grey dolphin, grey river dolphin, estuarine dolphin and Guianian river dolphin |
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| Kingdom | Animalia |
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| Phylum | Chordata |
| Class | Mammalia |
| Order | Cetacea |
| Family | Delphinidae |
| Genus | Sotalia (1) |
| Size |
Length of freshwater subspecies: 150 cm (2) Length of marine subspecies: 210 – 220 cm (2) Length of newborn: 70 – 90 cm (3) Adult weight: 35 – 45 kg (4) |